KR102147261B1 - Welding method using horizontal auto welding apparatus - Google Patents

Abstract

The present invention relates to a welding method using an automatic horizontal welding apparatus. The automatic horizontal welding apparatus comprises: a driving instrument unit (30) which drives along a transfer rail (10) installed with a magnet apparatus (20) as a medium, and transfers a welding torch (40) in a vertical direction and a diagonal direction toward a groove of an upper welding parent metal (1a) and a lower welding parent metal (1b); the welding torch (40) mounted on the driving instrument unit (30); a copper dipping unit (50) mounted on the driving instrument unit (30) to spray gas to a molten iron solution in the reverse direction to the welding progressing direction; and a control unit (60) which controls the driving instrument unit (30) along a special weaving pattern including a weaving driving and a diagonal driving including a large number of folding points, and controls the welding conditions for each position of the grooved surfaces of horizontal contact joints to keep a certain deposition volume to prevent a macro cross-section from forming with no welding surface on the upper welding parent metal (1a). The control unit (60) calculates a welding current and a welding voltage in a moving section between folding points, calculates the stop time at each folding point, controls the welder and the driving instrument unit (30) in accordance with the welding current and welding voltage of each moving section between the folding points calculated in the process of calculating the welding current and welding voltage and the stop time for each folding point calculated in the process of calculating the stop time, and performs a large-deposition welding by the special weaving pattern. According to one embodiment of the present invention, there are merits to greatly reduce the engagement rate, to prevent excessive work hours spent welding, to not need a slope work for generating beads after welding, and to make the work convenient.

Description

Welding method using horizontal auto welding apparatus {Welding method using horizontal auto welding apparatus}

The present invention relates to a welding method using a transverse automatic welding device, and more particularly, to a welding method using a transverse automatic welding device capable of always welding with a constant quality regardless of the skill level of the welder using the automatic welding device. .

In general, the shipbuilding process is performed by independently manufacturing hull blocks of various shapes and then combining these blocks together in a dock. To build one large ship, 250 to 400 hull blocks are made, and there are about 200 welding cells (2 vertical welds per cell) inside the hull block. The intersections must be welded.

As a general application field of welding equipment, vertical welding and welding of inclined portions are often performed in the manufacturing process of ships. For welding, the basic structure of a welding device that butt welds two welding members (steel plates) is due to the gap between the front bead and the welding member by melting the wire used as the welding material at the same time as the arc is generated from the welding torch. It is to form a back bead.

The above welding is a case of performing CO2 welding.If the welding member (steel plate) is thick, the depth to which the molten metal must be filled becomes deeper, and accordingly, the welder repeatedly welds several times on the bead formed primarily. The welding is completed through the method.

However, manual repetitive welding takes a long time to weld, has a high defect incidence rate depending on the skill level of the welder, and requires excessive correction welding man-hours due to an increase in the bonding rate.

1. Korean Patent Registration No. 10-1075159 (2011.10.19) 2. Korean Patent Registration No. 10-1473639 (2014.12.17)

The present invention has been conceived to solve the above problems, and an object of the present invention is to provide a welding method using a transverse automatic welding device capable of always welding with a constant quality regardless of the skill level of a welder using an automatic welding device.

The present invention for achieving the above object,

A driving mechanism unit for transporting the welding torch in vertical and oblique directions with respect to the improvement of the upper and lower welding base materials while traveling along the transfer rail installed via the magnet device; A welding torch mounted on the driving mechanism; A copper immersion metal mounted on the driving mechanism and spraying a protective gas onto the molten metal in a direction opposite to the direction in which the welding proceeds; The driving mechanism is controlled to be transported according to a special weaving pattern including a weaving run including a plurality of nodes and a diagonal run, and horizontally butt to maintain a certain amount of welding so that a macro cross section where no welding surface is formed on the upper welding base material is formed. A control unit that controls the welding conditions for each position of the joint improvement surface; including, wherein the control unit calculates the welding current and welding voltage in the moving section between the nodes and the nodes, calculates the stopping time at each node, and welding Welding current for each node and each moving section between nodes calculated in the current voltage calculation process, welding voltage and stopping time for each node calculated in the process of calculating the stopping time, control the welding machine and the driving mechanism according to the special weaving pattern. In the welding method using a transverse automatic welding device to perform this,

The special weaving pattern,

It moves along the Y-axis direction from the first node, which is the surface part, to the second node, which is the first root part, and moves from the second node, which is the first root part, to the third node, which is the second root part, along the Z-axis direction. It is characterized in that it moves from the third node to the second node, which is the first root part, along the Z-axis direction, and moves from the second node, which is the first root part, to the first node, which is the surface part, in the Y-axis direction.

Here, the special weaving pattern,

It moves along the Y-axis direction from the first node, which is the surface part, to the second node, which is the first root part, and moves from the second node, which is the first root part, to the third node, which is the second root part, along the Z-axis direction. When moving from the third node to the second node, which is the first route, it moves simultaneously in the Z-axis and X-axis directions, and when moving from the second node, which is the first route, to the first node, which is the surface part, it moves simultaneously in the X-axis and Y-axis directions. Characterized in that.

Here, the special weaving pattern,

When moving from the first node, which is the surface part, to the second node, which is the first root part, it moves simultaneously in the X-axis and Y-axis directions, and when moving from the second node, the first root part, to the third node, the second root part, the Z-axis direction and the X-axis It moves simultaneously in the direction of the Z axis from the 3rd node, which is the second root part, to the 2nd node, which is the first root part, and moves along the Y-axis direction from the 2nd node, which is the first root part, to the first node which is the surface part. Characterized in that.

In addition, in the present invention,

A contact limiting mechanism composed of a rubber tube press-fitted to the handle and a conductor fitted and fixed to the outer peripheral surface of the rubber tube is reinforced and provided;

The conductor is characterized in that it receives a high frequency current from a control unit operated by a power switch.

According to an exemplary embodiment of the present invention, the bonding rate can be greatly reduced, thereby preventing an excessive need for welding man-hours, and there is an advantage in that the work is convenient since there is no need for a finishing work for generating beads after welding.

In addition, according to the special weaving pattern of the present invention, it is possible to sufficiently fill the welding metal between the upper welding base material and the lower welding base material, and in particular, there is an advantage that the working time can be shortened as welding proceeds while moving.

1 to 4 are a perspective view, a front view, a side view, and a bottom view showing a lateral automatic welding device according to the present invention.
Figure 5 is a perspective view showing a separate extract of the copper damgeum in the transverse automatic welding device according to the present invention.
6A to 6C are views showing different embodiments of a special weaving pattern using a transverse automatic welding device according to the present invention.
7 is a perspective view showing an excerpt along the contact limiting mechanism in the transverse automatic welding device according to the present invention.

Hereinafter, it will be described in detail based on the accompanying drawings.

1 to 4 are a perspective view, a front view, a side view, and a bottom view showing a transverse automatic welding device according to the present invention.

1 to 4, the transverse automatic welding device according to the present invention is equipped with a handle 31 and mounted on a driving mechanism unit 30 for traveling on a transfer rail 10, and on the bottom of the driving mechanism unit 30 The upper welding base material is equipped with a welding torch 40 to be used, copper immersion 50 mounted on the welding direction side of the welding torch 40 to spray the protective gas G with molten molten metal, and a power switch SW. (1a) Voltage, current, wire supply speed, running speed, stopping time, for each position of the improved surface of the horizontal butt joint to maintain a constant amount of welding so that a macro cross-section (not shown) in which no welding surface is formed in (1a) Welding voltage and current with the control unit 60 for controlling the feed speed of the orthogonal weaving shaft part and the traveling shaft part of the driving mechanism part 30, a display part for displaying the welding state, a setting part for setting welding parameters, and a welding torch 40 It is configured to include a welding machine to supply.

The traveling mechanism unit 30 includes a traveling shaft for moving the welding device along the transfer rail 10 and a weaving motion for transferring the welding torch 40 in a vertical direction of the welding improvement surface, which is a vertical direction of the transfer rail 10 And a sensor unit for detecting a welding current and a welding voltage, and an orthogonal weaving shaft unit performing the operation.

In addition, a driving motor driving unit is provided in the driving shaft portion, and a weaving motor driving unit is provided in the orthogonal weaving shaft unit.

In addition, the sensor unit is provided with a welding current detection sensor for detecting a welding current and a welding voltage detection sensor for detecting a welding voltage.

In the welding apparatus of the above configuration, the control unit 60 operated by the power switch (SW) controls the arc generated by the welding torch 40 for each position of the improvement surface, the voltage, current, movement of the traveling shaft, stopping time, Without performing root pass welding (super-layer welding) forming the root of the gap formed between the two base materials (1a, 1b) by performing substitute welding with a special weaving pattern by controlling the wire supply speed. , It is characterized in that it is possible to perform the first pass welding of about 50%, preferably about 80% or more by performing substitute welding directly in the first pass inside the improvement surface.

At the same time, the control unit 60 additionally responds to various gap changes and generates output due to the difference in wire resistance through the fluctuation of the wire protrusion length change. The fluctuation of welding current and voltage is detected by welding current detection sensor and welding voltage detection sensor and displayed on the display.

In addition, the control unit 60 controls the driving motor driving unit and the weaving motor driving unit to change the actual driving speed of the welding device to maintain a certain amount of welding per unit volume.

Here, it is possible to select whether or not to change the actual running speed through arc sensing through the setting unit. In the case of welding under certain welding conditions (current, voltage, welding speed), when the gap increases, that is, the improvement unit volume is When it is increased, the amount of welding becomes smaller per unit volume, and the length of the wire protrusion becomes longer, and as a result, the output current and voltage values entering the welding current detection sensor and the welding voltage detection sensor decrease by -ΔA and -ΔV.

Since the control unit 60 has an effect of increasing the amount of welding per unit volume by reducing the driving speed of the driving mechanism unit 30 by adjusting the driving motor driving unit and the weaving motor driving unit, the length of the wire protrusion decreases again. The output current and voltage values entering the welding current detection sensor and welding voltage detection sensor increase by +ΔA and +ΔV again, thereby maintaining a certain amount of welding per unit volume.

5 is a perspective view showing a separate extract of copper immersion in the transverse automatic welding device according to the present invention.

Referring to FIG. 5, the copper immersion gold 50 has a rear gas injection part 51 and a front gas injection part 52 formed on the right side, and a groove-shaped gas passage whose depth decreases toward the welding direction on the left side. 53, the rear gasoline outlet (51a) and the front gastoe outlet (52a) has a structure formed.

The copper immersion 50 of the above-described structure is located in the opposite direction of the welding torch 40 among the welding progress direction, and is mounted on the welding device to spray the protective gas G to the opposite side of the welding torch 40, and then the upper part to be welded. The welding base material 1a and the lower welding base material 1b are in close contact with each other.

The copper immersion 50 of the above-described configuration can prevent oxidation by blocking contact with air by injecting the protective gas G into molten metal through the rear gas injection unit 51 and the front gas injection unit 52. have.

The above-described transverse automatic welding device is disclosed in detail in Korean Patent Publication No. 10-1473639, and thus further description will be omitted.

On the other hand, reference numeral 31 denotes a handle that can be gripped and transported by an operator, and reference numeral 61 denotes an operation switch capable of controlling ON/OFF.

Meanwhile, the control unit 60 of the present invention controls the driving mechanism unit 30 to be transported along a special weaving pattern including a plurality of nodes through weaving and diagonal driving.

6A to 6C are views showing different embodiments of a special weaving pattern using a transverse automatic welding device according to the present invention.

6A, the special weaving pattern is the Y-axis from the first node P1, which is the surface part, to the second node P2, which is the first root part, when the driving mechanism part 30 is stopped. It moves along the Z-axis direction from the second node (P2), which is the first route, to the third node (P3), which is the second route, and moves from the third node (P3), which is the second route, to the first route. This is a pattern method in which the female second node P2 moves along the Z-axis direction, and moves from the second node P2, which is the first root part, to the first node P1, which is the surface part, in the Y-axis direction.

When one cycle of the special weaving pattern is completed, the automatic welding device is transferred in the X-axis direction and welding is performed in the same manner as described above.

Such a pattern method has an advantage of eliminating welding defects since the welding metal can be sufficiently filled between the upper welding base material 1a and the lower welding base material 1b.

6B shows a special weaving pattern of another method.

In the special weaving pattern of FIG. 6B, the welding torch 40 moves along the Y-axis direction from the first node P1, which is the surface part, to the second node P2, which is the first root part while the driving mechanism part 30 is stopped. And, it moves along the Z-axis direction from the second node (P2) that is the first root part to the third node (P3) that is the second root part, and the second node that is the first root part from the third node (P3) that is the second root part. The movement of (P2') means that the welding torch 40 simultaneously moves in the Z-axis direction and the X-axis direction while the driving mechanism part 30 is moving, and the surface part is the first root part, the second node P2'. The movement of the first node P1' is a method of simultaneously moving in the X-axis direction and the Y-axis direction.

This pattern method has the advantage of shortening the working time more than the pattern method of FIG. 6A as it moves while welding while being able to sufficiently fill the welding metal between the upper welding base material 1a and the lower welding base material 1b. have.

6C shows another special weaving pattern.

In the special weaving pattern of FIG. 6C, the movement from the first node P1, which is the surface part, to the second node P2, which is the first root part, is when the welding torch 40 is in a state in which the driving mechanism part 30 is moving. When moving from the second node (P2), which is the first root part, to the third node (P3), which is the second root part, it moves simultaneously in the Z-axis direction and the X-axis direction. In the third node (P3), the movement of the second node (P2'), which is the first root part, moves the welding torch (40) along the Z-axis direction while the driving mechanism part (30) is stopped. This is a method of moving along the Y-axis direction from the node P2' to the first node P1', which is the surface part.

This pattern method has the advantage of shortening the working time more than the pattern method of FIG. 6A as it moves while welding while being able to sufficiently fill the welding metal between the upper welding base material 1a and the lower welding base material 1b. have.

According to an embodiment of the present invention, the bonding rate can be significantly reduced, thereby preventing excessive welding man-hours, and there is an advantage in that the work is convenient since there is no need for a finishing work for generating beads after welding.

In addition, according to the special weaving pattern of the present invention, it is possible to sufficiently fill the welding metal material between the upper welding base material 1a and the lower welding base material 1b, and in particular, the advantage of shortening the working time as welding proceeds while moving. have.

7 is a perspective view showing an excerpt along the contact limiting mechanism in the transverse automatic welding device according to the present invention.

On the other hand, it is necessary to restrict the operator from touching the carriage without permission while the welding operation is in progress.In this embodiment, the above problem is solved by reinforcing the contact limiting mechanism 70 to the handle 31. .

Referring to FIG. 7, the contact limiting mechanism 70 is fixed by being fitted with a rubber tube 71 that is press-fitted to the outer surface of the handle 31 and the outer circumferential surface of the rubber tube 71 to supply current from the control unit 60 It consists of a receiving conductor 72.

For example, when the power switch (SW) installed in the control unit 60 is turned on, the control unit 60 is operated by the power switch (SW) to supply current to the conductor 72 via an electric wire. When an operator inadvertently touches the conductor 72, a high-frequency current is transmitted to the operator, thereby limiting the operator's access.

Accordingly, it is possible to prevent the operator's unauthorized contact.

On the other hand, when the power switch (SW) is turned off, the high frequency current supplied to the conductor 72 is cut off.

Although the present invention has been described in detail only with respect to the described specific embodiments, it is natural for those skilled in the art that various modifications and modifications can be made within the scope of the technical idea of the present invention, and it is natural that such modifications and modifications belong to the appended claims.

10: transfer rail 20: magnet device 30: travel mechanism unit
31: handle 40: welding torch 50: copper dipped
60: control unit SW: power switch 70: contact limiting mechanism
71: rubber tube 72: conductor 1a: upper welding base material
1b: lower welding base material

Claims (4)

While driving along the transfer rail 10 installed via the magnet device 20, the welding torch 40 is transferred in the vertical and diagonal directions for the improvement of the upper welding base material 1a and the lower welding base material 1b, A traveling mechanism unit 30 having 31; A welding torch 40 mounted on the driving mechanism unit 30; A copper immersion gold 50 mounted on the driving mechanism unit 30 to inject a protective gas G into the molten metal in a direction opposite to the direction in which the welding proceeds; Equipped with a power switch (SW), the driving mechanism unit 30 is controlled to be transferred along a special weaving pattern including a weaving run including a plurality of nodes and an oblique run, and a welding surface is not formed on the upper welding base material 1a. Including a control unit 60 for controlling the welding condition for each position of the improved surface of the horizontal butt joint so as to maintain a constant amount of welding so that the macro cross section is not formed, but the control unit 60 is welded in the moving section between the nodes and the nodes. The current and welding voltage are calculated, the stopping time at each node is calculated, the welding current for each node and the moving section between the nodes calculated in the welding current voltage calculation process, the welding voltage and the nodes calculated in the process of calculating the stopping time In the welding method using a transverse automatic welding device that controls the welding machine and the driving mechanism part 30 according to the respective stopping time so that substitute welding is performed by a special weaving pattern,
The special weaving pattern,
It moves from the first node (P1), which is the surface part, to the second node (P2), which is the first root part, along the Y-axis direction, and from the second node (P2), which is the first root part, to the third node (P3), which is the second root part. It moves along the Z-axis direction, and when moving from the third node (P3), which is the second root part, to the second node (P2'), which is the first root part, it moves simultaneously in the Z-axis direction and the X-axis direction. A welding method using a transverse automatic welding device, characterized in that when moving from the node (P2') to the first node (P1'), which is a surface part, simultaneously moves in the X-axis direction and the Y-axis direction.
While driving along the transfer rail 10 installed via the magnet device 20, the welding torch 40 is transferred in the vertical and diagonal directions for the improvement of the upper welding base material 1a and the lower welding base material 1b, A traveling mechanism unit 30 having 31; A welding torch 40 mounted on the driving mechanism unit 30; A copper immersion gold 50 mounted on the driving mechanism unit 30 to inject a protective gas G into the molten metal in a direction opposite to the direction in which the welding proceeds; Equipped with a power switch (SW), the driving mechanism unit 30 is controlled to be transferred along a special weaving pattern including a weaving run including a plurality of nodes and an oblique run, and a welding surface is not formed on the upper welding base material 1a. Including a control unit 60 for controlling the welding condition for each position of the improved surface of the horizontal butt joint so as to maintain a constant amount of welding so that the macro cross section is not formed, but the control unit 60 is welded in the moving section between the nodes and the nodes. The current and welding voltage are calculated, the stopping time at each node is calculated, the welding current for each node and the moving section between the nodes calculated in the welding current voltage calculation process, the welding voltage and the nodes calculated in the process of calculating the stopping time In the welding method using a transverse automatic welding device that controls the welding machine and the driving mechanism part 30 according to the respective stopping time so that substitute welding is performed by a special weaving pattern,
The special weaving pattern,
When moving from the first node (P1), which is the surface part, to the second node (P2), which is the first root part, it moves simultaneously in the X-axis direction and the Y-axis direction, and from the second node (P2), which is the first root part, the third is the second root part. When moving to the node (P3), it moves in the Z-axis direction and the X-axis direction at the same time, and moves from the third node (P3), which is the second root part, to the second node (P2'), which is the first root part, along the Z-axis direction. A welding method using a transverse automatic welding device, characterized in that it moves along the Y-axis direction from a second node (P2') as a first root portion to a first node (P1') as a surface portion.
The method according to claim 1 or 2,
A contact limiting mechanism (70) composed of a rubber tube (71) press-fitted to the handle (31) and a conductor (72) fitted to and fixed to the outer peripheral surface of the rubber tube (71) is reinforced and provided;
The conductor 72 is a welding method using a transverse automatic welding device, characterized in that the high frequency current is supplied from the control unit 60 operated by the power switch (SW). delete

Images