Control method of argon arc automatic welding line energy control system for narrow-gap automatic welding

Abstract

The invention discloses a control method of an argon arc automatic welding line energy control system for narrow-gap automatic welding. The argon arc automatic welding line energy control system comprises a machine head module, a machine head control module and a data processing module. The control method comprises the steps that the machine head module conducts backing welding, and the whole backing welding process is controlled according to the maximum linear energy; the real-time walking speed of the machine head module is calculated in combination with data obtained by the laser irradiation head; the welding speed is calculated according to the linear energy = UI / V, and then the machine head walking speed is calculated according to the perimeter of the outer ring of the track and the perimeter of the inner wall of the pipeline; and welding is completed according to the full-thickness welding parameters of the pipeline. Related information is recorded in the data processing module, the depth of a weld bead in a groove is monitored in real time through laser and fed back to the numerical control processing module, an instruction is sent to the machine head through the control module according to an algorithm, the tungsten electrode end linear speed (namely the welding speed) is adjusted and controlled, the height of the machine head is finely adjusted in real time, and the welding quality is improved. And the required welding seam quality is achieved.

Description

Technical field

[0001] The present invention relates to the technical field of weld line energy control, in particular to the technical field of a control method of an argon arc automatic welding line energy control system for narrow gap automatic welding. [Background Technology]

[0002] During the automatic welding of thick-walled pipes, the weld head advances along a fixed track along the pipe's outer wall at a specific speed. However, due to the significant difference in circumference between the inner and outer walls of thick-walled pipes, this speed cannot directly reflect the linear velocity of the tungsten tip, hindering real-time control of the weld energy input and the weld head's adaptability to the weld bead. To maintain a constant weld energy input and improve the weld head's adaptability to the weld bead, a new control method for the argon arc weld energy control system for narrow-gap automatic welding is required. [Summary of the invention]

[0003] The purpose of the present invention is to solve the problems in the prior art and propose a control method for the argon arc automatic welding wire energy control system for narrow gap automatic welding, which can control a certain welding wire energy, improve the adaptability of the machine head to the weld bead, and achieve the required weld quality.

[0004] To achieve the above-mentioned object, the present invention proposes a control method for an argon arc automatic welding wire energy control system for narrow gap automatic welding, wherein the argon arc automatic welding wire energy control system includes a head module, a head control module and a data processing module, wherein the head control module is electrically connected to the head module and the data processing module, and the head module is provided with a laser irradiation head and a lanthanum tungsten electrode, and the laser irradiation head is electrically connected to the data processing module; the head module is fixed on a track, and the track is fixed on the outer wall of the thick-walled tube outside the thick-walled tube;

[0005] The control method includes the following steps:

[0006] Step s1: The head module performs bottom welding. The entire bottom welding process is controlled according to the maximum line energy. The bottom welding head travel speed and the bottom welding speed are the same as the time it takes for the head module to circle the pipe.

[0007] Step s2: Calculate the real-time travel speed of the head module based on the data obtained by the laser irradiation head, where the real-time travel speed is the speed of the head module relative to the track;

[0008] Step s3: Calculate the welding speed according to the linear energy = UI / V, and then calculate the head travel speed based on the outer circumference of the track and the inner circumference of the pipe. The welding speed and the head travel speed are the same as the time required to travel around the pipe.

[0009] Step s4: Complete welding according to the full-thickness welding parameters of the pipeline; the full-thickness welding parameters of the pipeline meet the following conditions: when the inner wall of the thick-walled pipe on the inside is welded to the outer wall of the thick-walled pipe, the line energy remains unchanged, and as the current and voltage increase, the welding speed increases and the head travel speed increases; in the local area of ​​the filling weld, when the inner wall of the thick-walled pipe is welded to the outer wall of the thick-walled pipe, the line energy remains unchanged, and when the current, voltage and welding speed remain unchanged, the head travel speed gradually decreases.

[0010] Preferably, the laser irradiation head is used to monitor the depth of the weld in the groove in real time and provide feedback to the data processing module.

[0011] Preferably, the pipeline full thickness welding parameters are:

[0012]

[0013] The beneficial effects of the present invention are as follows: the present invention inputs relevant information into the data processing module, uses laser to monitor the depth of the weld in the groove in real time, and feeds back to the numerical control processing module. According to the algorithm, the instructions are sent through the control module to the machine head to adjust and control the linear speed of the tungsten extreme end (i.e., the welding speed), and fine-tune the machine head height in real time to achieve the required weld quality.

[0014] The features and advantages of the present invention will be described in detail through embodiments with reference to the accompanying drawings.

Brief Description of the Drawings

[0015] Figure 1 This is the overall architecture of the control system for the control method of the argon arc automatic welding line energy control system of the narrow gap automatic welding of the present invention. Figure 1 ;

[0016] Figure 2 This is the overall architecture of the control system for the control method of the argon arc automatic welding line energy control system of the narrow gap automatic welding of the present invention. Figure 2 .

[0017] In the figure: 1-head module, 2-laser irradiation head, 3-lanthanum tungsten electrode, 4-thick-walled tube, 41-outer wall of thick-walled tube, 42-inner wall of thick-walled tube, 5-head control module, 6-data processing module; the arc arrow indicates the direction of movement of the head. [Specific implementation method]

[0018] See Figure 1 、 Figure 2The present invention, the argon arc automatic welding wire energy control system includes a head module 1, a head control module 5 and a data processing module 6, the head control module 5 is electrically connected to the head module 1 and the data processing module 6, the head module 1 is provided with a laser irradiation head 2 and a lanthanum tungsten electrode 3, the laser irradiation head 2 is electrically connected to the data processing module 6; the head module 1 is fixed on a track, and the track is fixed on the outer wall 41 of the thick-walled tube 4;

[0019] The control method includes the following steps:

[0020] Step s1: The die head module 1 performs bottom welding. The entire bottom welding process is controlled according to the maximum line energy. The bottom welding die head travel speed and the bottom welding speed during the bottom welding process are the same as the time it takes for the die head module 1 to circle the pipe.

[0021] Step s2: Calculate the real-time travel speed of the head module 1 based on the data obtained by the laser irradiation head 2. The real-time travel speed is the speed of the head module 1 relative to the track.

[0022] Step s3: Calculate the welding speed according to the linear energy = UI / V, and then calculate the head travel speed based on the outer circumference of the track and the inner circumference of the pipe. The welding speed and the head travel speed are the same as the time required to travel around the pipe.

[0023] Step s4: Complete welding according to the full-thickness welding parameters of the pipeline; the full-thickness welding parameters of the pipeline meet the following conditions: when the thick-walled tube inner wall 42 on the inside of the thick-walled tube 4 is welded to the thick-walled tube outer wall 41, the line energy remains unchanged, and as the current and voltage increase, the welding speed increases, and the head travel speed increases; in the local area of ​​the filling weld, when the thick-walled tube inner wall 42 is welded to the thick-walled tube outer wall 41, the line energy remains unchanged, and when the current, voltage, and welding speed remain unchanged, the head travel speed gradually decreases.

[0024] Working process of the present invention:

[0025] The control method of the argon arc automatic welding line energy control system for narrow gap automatic welding of the present invention is described in conjunction with the accompanying drawings during operation.

[0026] An example is given for a φ565×100mm pipe.

[0027]

[0028] When welding from the inner wall of the pipe to the outer wall, the line energy remains unchanged. As the current and voltage increase, the welding speed increases and the head travel speed increases.

[0029] In local areas such as filling welding, when welding from the inner wall of the pipe to the outer wall, the line energy remains unchanged, and the current, voltage, and welding speed remain unchanged, the head travel speed gradually decreases.

[0030]

[0031]

[0032] Simulate according to φ565×100mm pipeline:

[0033]

[0034]

[0035]

[0036] The sensor module of the present invention feeds back to the core computing module, and then sends instructions to the control module. This not only can adjust the welding line energy in real time, but also can adaptively track the weld thickness and adjust the tungsten electrode.

[0037] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A control method for an argon arc automatic welding line energy control system for narrow gap automatic welding, characterized in that: The argon arc automatic welding wire energy control system comprises a head module (1), a head control module (5) and a data processing module (6); the head control module (5) is electrically connected to the head module (1) and the data processing module (6); a laser irradiation head (2) and a lanthanum tungsten electrode (3) are provided on the head module (1); the laser irradiation head (2) is electrically connected to the data processing module (6); the head module (1) is fixed on a track, and the track is fixed on the outer wall (41) of the thick-walled tube (4) outside the thick-walled tube; The control method includes the following steps: Step s1: The head module (1) performs bottom welding. The entire bottom welding process is controlled according to the maximum line energy. The bottom welding head travel speed and the bottom welding speed are the same as the time it takes for the head module (1) to circle the pipe. Step s2: combining the data obtained by the laser irradiation head (2), calculating the real-time travel speed of the head module (1), wherein the real-time travel speed is the speed of the head module (1) relative to the track; Step s3: Calculate the welding speed according to the linear energy = UI / V, and then calculate the head travel speed based on the outer circumference of the track and the inner circumference of the pipe. The welding speed and the head travel speed are the same as the time required to travel around the pipe. Step s4: completing welding according to the full-thickness welding parameters of the pipeline; the full-thickness welding parameters of the pipeline meet the following conditions: when the thick-walled pipe inner wall (42) on the inner side of the thick-walled pipe (4) is welded to the thick-walled pipe outer wall (41), the line energy remains unchanged, and as the current and voltage increase, the welding speed increases, and the machine head travel speed increases; in the local area of ​​the filling weld, when the thick-walled pipe inner wall (42) is welded to the thick-walled pipe outer wall (41), the line energy remains unchanged, and when the current, voltage, and welding speed remain unchanged, the machine head travel speed gradually decreases.

2. The control method of the argon arc automatic welding wire energy control system for narrow gap automatic welding according to claim 1, characterized in that: The laser irradiation head (2) is used to monitor the depth of the weld in the groove in real time and provide feedback to the data processing module (6).

3. The control method of the argon arc automatic welding wire energy control system for narrow gap automatic welding according to claim 1, characterized in that: The pipeline full thickness welding parameters are:

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