KR102387967B1 - electro gas welding system capable of measuring real time welding heat input - Google Patents

Abstract

The present invention relates to an electrogas welding system capable of measuring heat input in real time, in which heat input at a corresponding position during welding can be measured in real time to be monitored. The electrogas welding system comprises: a carriage part installed to move forward and backward along a rail installed on one side of an object to be welded, and having one side connected to an electrode for generating an arc and a copper immersion installed on the other side to block slag leakage while supplying gas; a power source part applying welding power to the electrode; a moving distance measuring sensor measuring the moving distance information of the carriage part; a timer measuring the moving time information of the carriage part; and a heat input outputting part outputting real-time heat input information by using information on current applied to the electrode, voltage information, the moving distance information and the moving time information. The present invention can improve the quality of a welding structure.

Description

Electro gas welding system capable of measuring real time welding heat input

The present invention relates to an electrogas welding system capable of real-time heat input measurement, and more particularly, to an electro gas welding system capable of real-time heat input measurement capable of measuring and monitoring the heat input amount at a corresponding position during welding in real time. it's about

In general, the proportion of application of high-strength ultra-thick materials is increasing according to the enlargement of ships. Therefore, in order to improve productivity, there is a trend to prefer a welding technique that proceeds with a high heat input 1 pass rather than a welding technique that has been performed with a low heat input multi-layer pass. ) is widely used in general.

However, since the conventional electrogas welding machine can give a relatively large amount of heat input (High Heat Input: 100 to 700 kJ/cm) to the welding object, due to the generation of a large amount of slag during welding, the hunting of the current and voltage is severe and There was a problem that the movement speed may vary locally.

In addition, since welding can be performed while controlling the moving speed even manually, the amount of heat input may be different for each section, and this may cause a difference in welding quality for each operator.

In the case of conventional low heat input vertical phase welding, even if the amount of heat input in some sections is somewhat irregular, the effect on the quality of the welded structure may be small because multi-layer welding proceeds. However, in the case of high heat input welding, welding is completed in 1 pass Therefore, depending on the welding operation status each time, the effect on the quality of the welded structure can be very large.

In addition, in the case of high heat input welding, the deterioration of toughness and material softening of the heat affected zone (HAZ) due to the long high temperature holding time and slow cooling rate act as fatal disadvantages. It is very important that welding be performed within the range of heat input determined according to the Welding Procedure Specification (WPS).

The conventional electro welding machine can simply check the current and voltage output during welding, and since there is no separate heat input measuring device, the average value from the start to the completion of welding is generally applied even if current/voltage hunting occurs by the operator. Even if the movement speed is also locally unstable, the movement distance was calculated as the average value over the entire time, and the calculation had to be done manually.

However, in the case of calculating the total amount of heat input in the conventional post-calculation method that relies on manual work, it is impossible to check the state of the heat input for each section. There were some difficult problems.

Korean Patent Application No. 10-2012-0155485

The present invention is to solve various problems including the above problems, and it is possible to measure and monitor the amount of heat input at a corresponding position during welding in real time, and to accurately derive the amount of heat input according to a desired data output value, When welding defects and quality-related problems occur during welding, the cause can be easily identified based on the real-time monitored heat input output value, and as a result, real-time heat input measurement that can improve the quality of welded structures is possible. An object of the present invention is to provide an electro-gas welding system. However, these problems are exemplary, and the scope of the present invention is not limited thereto.

The electro gas welding system capable of real-time heat input measurement according to the spirit of the present invention for solving the above problems is installed so as to move forward and backward along a rail installed on one side of a welding object, and is connected to an electrode that generates an arc on one side, , A carriage portion in which a copper immersion for blocking slag leakage while supplying gas to the other side is installed; a power source for applying welding power to the electrode; a moving distance measuring sensor for measuring moving distance information of the carriage part; a timer for measuring movement time information of the carriage unit; and a heat input output unit configured to output real-time heat input information using the current information applied to the electrode, the voltage information, the movement distance information, and the movement time information.

In addition, according to the present invention, the heat input output unit may include: a current information obtaining unit which obtains the current information; a voltage information obtaining unit obtaining the voltage information; a movement speed information calculator configured to calculate movement speed information obtained by dividing the movement distance information by the movement time; and a heat input calculation unit that multiplies the current information and the voltage information and divides it into the moving speed information and the unit information to calculate the heat input information.

Also, according to the present invention, the heat input output unit may further include a display unit that displays the heat input information in real time.

In addition, according to the present invention, when the heat input amount information exceeds a reference range, the heat input output unit applies a power control signal for adjusting voltage or current to the power source unit or stops welding and then generates an alarm signal It may further include; an alarm unit for outputting.

In addition, according to the present invention, a carriage moving device for moving the carriage portion so that the carriage portion can be moved along the rail; may further include.

In addition, according to the present invention, when the amount of heat input information exceeds a reference range, a movement speed control unit for applying a speed control signal to the carriage moving device; may further include.

In addition, according to the present invention, the moving speed control unit, when the heat input amount information is less than a reference value, a low speed control unit for applying a low speed control signal to the carriage moving device to reduce the current moving speed; a high-speed control unit that applies a high-speed control signal to the carriage moving device to increase a current moving speed when the amount of heat input is greater than or equal to a reference value; and a welding stop controller that applies a welding stop control signal to the carriage moving device to stop welding when the heat input information is equal to or greater than the upper limit.

Also, according to the present invention, the moving distance measuring sensor may be a laser sensor or a moving distance measuring wheel sensor.

In addition, according to the present invention, the measurement reference point of the moving distance measuring sensor may be the upper end of the copper immersion.

Also, according to the present invention, a current gauge or a voltage gauge may be installed on one side of the carriage unit.

According to some embodiments of the present invention made as described above, it is possible to measure and monitor the amount of heat input at a corresponding position during welding in real time, to accurately derive the amount of heat input according to a desired data output value, and proceed with welding. In doing so, when a welding defect or quality-related problem occurs, the cause can be easily identified based on the real-time monitored heat input output value, and as a result, the quality of the welded structure can be improved. Of course, the scope of the present invention is not limited by these effects.

1 is a block diagram conceptually illustrating an electrogas welding system capable of measuring a real-time heat input amount according to some embodiments of the present invention.
FIG. 2 is a perspective view illustrating an example of the electrogas welding system capable of measuring the amount of heat input in real time of FIG. 1 .

Hereinafter, several preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Examples of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art, and the following examples may be modified in various other forms, and the scope of the present invention is as follows It is not limited to an Example. Rather, these embodiments are provided so as to more fully and complete the present disclosure, and to fully convey the spirit of the present invention to those skilled in the art. In addition, in the drawings, the thickness or size of each layer is exaggerated for convenience and clarity of description.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically illustrating ideal embodiments of the present invention. In the drawings, variations of the illustrated shape can be envisaged, for example depending on manufacturing technology and/or tolerances. Accordingly, embodiments of the spirit of the present invention should not be construed as limited to the specific shape of the region shown in the present specification, but should include, for example, changes in shape caused by manufacturing.

1 is a block diagram conceptually illustrating an electrogas welding system 100 capable of measuring real-time heat input according to some embodiments of the present invention, and FIG. 2 is an electro-gas welding system capable of measuring real-time heat input of FIG. 1 ( 100) is a perspective view showing an example.

As shown in FIGS. 1 and 2 , the electro gas welding system 100 capable of measuring real-time heat input according to some embodiments of the present invention includes a carriage 10 , a power source 20 and , a movement distance measuring sensor 30 , a timer 40 , and a heat input output unit 50 may be included.

For example, as shown in Figures 1 and 2, the carriage portion 10 is installed so as to be able to move forward and backward along the rail 11 installed on one side of the welding object (1) (2), and arc on one side. It may be a type of movable device that is connected to the generating electrode 12, and is provided with a copper immersion plate 13 that blocks slag leakage while supplying gas to the other side.

Here, the welding object (1) (2) may be two plate materials to be welded to each other, and may be mainly a ship's plate, and the rail 11 is a fixed rail that can be fixed to the ship's plate. can be

However, the welding objects 1 and 2 of the present invention are not necessarily limited to ships, and various types of plate materials that can be welded to each other may be applied.

In addition, the copper immersion 13 may be formed with a gas supply part on one side to supply a gas that protects the arc generated by the electrode, and to cover the welding part so as to block the molten slag leakage due to the arc. It may be a block structure in which a refrigerant flow path through which a refrigerant may be circulated may be formed to cool the slag and prevent overheating due to high heat.

In addition, for example, as shown in Figure 2, the carriage unit 10, a current gauge (G1) or a voltage gauge (G2) can be installed on one side so that the user can check the current information and voltage information in real time. there is. However, the present invention is not necessarily limited thereto, and it is also possible to omit the current gauge G1 or the voltage gauge G2.

Accordingly, the carriage unit 10 generates an arc by an electrode while moving forward and backward along the rail 11 (elevating and lowering in the drawing), and supplies gas to protect the arc while cooling the slag generated by the arc. It may be a kind of movable device capable of forming a welding line for joining the welding objects 1 and 2 to each other.

In addition, for example, the power source unit 20 is a device for applying welding power to the electrode 12 , and after rectifying the AC power to a DC power and boosting the voltage, power is applied to the electrode to generate an arc. It may be any type of power supply that can supply it. The power source unit 20 is not limited to the drawings, and a wide variety of shapes and types of various power supply devices may be applied.

In addition, for example, the moving distance measuring sensor 30 is a sensor for measuring the moving distance (L) information of the carriage unit 10 , preferably a non-contact type laser sensor or a contact type moving distance measuring wheel sensor. can be applied.

Here, the measurement reference point of the moving distance measuring sensor 30 may be the upper end of the copper immersion immersion 13 so that it is easy to measure for convenience and becomes the starting reference point of the welding line.

In addition, for example, the timer 40 is a type of time measurement for measuring movement time information of the carriage unit 10 in order to calculate the moving speed of the carriage unit 10 together with the movement distance measuring sensor 30 . It may be a device.

More specifically, for example, the timer 40 includes various types and types of timer circuits or timers capable of measuring the time required for movement based on the time when the movement distance measuring sensor 30 starts to measure. All elements and the like may be applied.

In addition, for example, the heat input output unit 50 is a variety of computing devices that output real-time heat input information using the current information applied to the electrode 12 , the voltage information, the movement distance information, and the movement time information. However, various output devices such as a central processing unit, a microprocessor, a calculation circuit, and a storage device in which a calculation program is stored may all be applied.

More specifically, for example, as shown in FIG. 1 , the heat input output unit 50 includes a current information obtaining unit 51 obtaining the current information, and a voltage information obtaining unit obtaining the voltage information. (52) and a moving speed information calculating unit 53 for calculating moving speed information obtained by dividing the moving distance information by the moving time, multiplying the current information and the voltage information, and using this as the moving speed information and unit information A heat input calculation unit 54 for dividing and calculating the heat input information, a display unit 55 for displaying the heat input information in real time, and the power source unit 20 when the heat input information exceeds a reference range It may include an alarm unit 56 for outputting an alarm signal after applying a power control signal for adjusting the voltage or current to the welding or stopping welding.

Accordingly, the heat input output unit 50 automatically calculates heat input information using the moving speed information obtained by dividing the current information required for welding, the voltage information, and the moving distance information by the moving time during welding. , when the heat input information exceeds the reference range, an alarm signal may be automatically output after applying a power control signal for adjusting voltage or current to the power source unit 20 or stopping welding.

For example, when calculating the constant heat input during 2-electrode electrogas welding,

Face part torch current: 370A / voltage: 38V

Root part torch current: 360A / voltage: 35V

Movement speed (L/sec), if it takes 400 sec to move 200mm,

Instantaneous heat input (Heat input, kJ/mm): {(370*38)+(360*35)}/(200/400)/ 1000=53.3 kJ/mm

can be

Therefore, it is possible to measure the amount of heat input at the location during welding in real time and monitor it to the user, and accurately derive the amount of heat input according to the desired data output value. Based on the monitored heat input output value, the cause can be easily identified, and as a result, the quality of the welded structure can be improved.

On the other hand, as shown in FIGS. 1 and 2 , in the electro gas welding system 100 capable of measuring the amount of heat input in real time according to some embodiments of the present invention, the carriage part 10 connects the rail 11 to the A carriage moving device 60 for moving the carriage unit 10 so that it can be moved accordingly, and a moving speed controller for applying a speed control signal to the carriage moving device 60 when the heat input information exceeds a reference range ( 70) may be further included.

More specifically, for example, as shown in FIGS. 1 and 2 , when the heat input information is less than a reference value, the moving speed control unit 70 may reduce the current moving speed. a low-speed control unit 71 for applying a low-speed control signal to the When the amount of heat input information is equal to or greater than the upper limit, a welding stop controller 73 for applying a welding stop control signal to the carriage moving device 60 to stop welding may be included.

Therefore, according to the present invention, when the heat input information exceeds the reference range during welding while the carriage 10 is automatically moved along the rail 11 by the carriage moving device 60, The moving speed of the carriage unit 10 may be controlled by applying a speed control signal to the carriage moving device 60 .

More specifically, for example, when the heat input information is less than the reference value, the current movement speed can be automatically reduced by the movement speed controller 70 , and when the heat input information is greater than or equal to the reference value, the current movement speed automatically can be increased, and if the heat input information is equal to or greater than the upper limit, welding may be automatically stopped.

Therefore, the movement speed of the carriage part 10 can be adjusted according to the amount of heat input, so that the phenomenon of underheating or excessive heat input can be prevented in advance. can

Although the present invention has been described with reference to the embodiments shown in the drawings, which are merely exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

1, 2: Welded object
10: carriage part
11: rail
12: electrode
13: Dongdamgeum
20: power source unit
30: travel distance measuring sensor
40: timer
50: heat input output unit
51: current information acquisition unit
52: voltage information acquisition unit
53: movement speed information calculation unit
54: heat input calculation unit
55: display unit
56: alarm unit
60: carriage moving device
70: movement speed control unit
71: low speed control unit
72: high-speed control unit
73: welding stop control
G1: Current Gauge
G2: voltage gauge
100: Electro gas welding system capable of real-time heat input measurement

Claims (10)

A carriage portion that is installed so as to move forward and backward along the rail installed on one side of the object to be welded, is connected to an electrode that generates an arc on one side, and is provided with a copper immersion plate to block slag leakage while supplying gas to the other side;
a power source for applying welding power to the electrode;
a moving distance measuring sensor for measuring moving distance information of the carriage part;
a timer for measuring movement time information of the carriage unit;
a heat input output unit for outputting real-time heat input information using current information, voltage information, movement distance information, and movement time information applied to the electrode; and
and a carriage moving device for moving the carriage portion so that the carriage portion can be moved along the rail.
The heat input output unit,
a current information obtaining unit for obtaining the current information;
a voltage information obtaining unit obtaining the voltage information;
a movement speed information calculator configured to calculate movement speed information obtained by dividing the movement distance information by the movement time; and
a heat input calculation unit for multiplying the current information and the voltage information and dividing it into the moving speed information and the unit information to calculate heat input information;
Including, an electro gas welding system capable of real-time heat input measurement. delete The method of claim 1,
The heat input output unit,
a display unit for displaying the heat input information in real time;
Further comprising, an electro gas welding system capable of real-time heat input measurement. The method of claim 1,
The heat input output unit,
an alarm unit for applying a power control signal for adjusting voltage or current to the power source unit or outputting an alarm signal after stopping welding when the amount of heat input exceeds a reference range;
Further comprising, an electro gas welding system capable of real-time heat input measurement. delete The method of claim 1,
a movement speed controller for applying a speed control signal to the carriage moving device when the amount of heat input exceeds a reference range;
Further comprising, an electro gas welding system capable of real-time heat input measurement. 7. The method of claim 6,
The moving speed control unit,
a low-speed controller for applying a low-speed control signal to the carriage moving device to reduce a current moving speed when the heat input information is less than a reference value;
a high-speed control unit that applies a high-speed control signal to the carriage moving device to increase a current moving speed when the amount of heat input is greater than or equal to a reference value; and
a welding stop controller for applying a welding stop control signal to the carriage moving device to stop welding when the heat input information is greater than or equal to the upper limit;
Including, an electro gas welding system capable of real-time heat input measurement. The method of claim 1,
The moving distance measuring sensor is a laser sensor or a moving distance measuring wheel sensor, an electro gas welding system capable of measuring heat input in real time. The method of claim 1,
The measurement reference point of the moving distance measuring sensor is the upper end of the copper immersion, an electro gas welding system capable of real-time heat input measurement. The method of claim 1,
The carriage unit, an electro gas welding system capable of real-time heat input measurement, in which a current gauge or a voltage gauge is installed on one side.

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