A ship welding process and hull

Abstract

The present application relates to the ship technology field, disclose a kind of ship welding process and ship body.Therein, welding torch is applied to the welding of T joint with 5mm welding leg height using ship welding process, and the ship welding process includes the following steps: S1, welding torch is arc welding according to preset arc starting parameter;When using flat angle welding, preset arc starting parameter includes the following parameters: arc starting current is 260A, arc starting voltage is 23.8V, and arc starting wire feeding speed is 11000mm / min;When using vertical angle welding, preset arc starting parameter includes the following parameters: arc starting current is 170A, arc starting voltage is 22V, and arc starting wire feeding speed is 5000mm / min;S2, welding torch is standard welding according to preset welding parameter;S3, welding torch is arc extinguishing welding according to preset arc extinguishing parameter;In S1 step, S2 step and S3 step, welding torch is swing according to preset swing parameter, to form the welding leg with 5mm welding leg height.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a ship welding process and hull. Background Technology

[0002] Currently, robots are widely used in ship hull welding. Compared with traditional manual welding, using robots to weld ship structures has advantages such as high efficiency and stable quality. However, robots do not have the same adaptive capabilities as welders. For example, they cannot collect factors such as bevel changes and provide real-time feedback control. These factors make the robot-specific welding process extremely complex.

[0003] Furthermore, as the first step in the welding process, the success of arc initiation welding directly affects the quality and efficiency of the entire welding process. However, in actual operation, if appropriate arc initiation parameters are not selected, various defects often occur at the arc initiation welding position, such as incomplete penetration at the arc initiation position, inability to achieve a smooth transition, unattractive weld formation, and excessive weld reinforcement, which seriously affect the strength and reliability of the welded joint.

[0004] Therefore, there is an urgent need for a ship welding process and hull design to solve the aforementioned problems. Summary of the Invention

[0005] Based on the above, the purpose of this invention is to provide a ship welding process and hull, which realizes the automatic welding of T-joints with a weld leg height of 5mm using a robotic arm, ensuring stable weld quality, and increasing the welding speed by more than 20% compared with manual welding.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] On one hand, a ship welding process is provided, in which a welding torch is mounted on a robotic arm. The welding torch is used to weld T-joints with a weld leg height of 5mm using the ship welding process. The ship welding process includes the following steps:

[0008] S1. The welding torch initiates arc welding according to the preset arc initiation parameters;

[0009] When using fillet welding, the preset arc starting parameters include the following parameters: arc starting current is 260A, arc starting voltage is 23.8V, and arc starting wire feeding speed is 11000mm / min;

[0010] When using vertical fillet welding, the preset arc starting parameters include the following parameters: arc starting current of 170A, arc starting voltage of 22V, and arc starting wire feeding speed of 5000mm / min.

[0011] S2. The welding torch performs standard welding according to the preset welding parameters;

[0012] S3. The welding torch performs arc extinguishing welding according to the preset arc extinguishing parameters;

[0013] In steps S1, S2 and S3, the welding torch oscillates according to preset oscillation parameters to form a weld leg with a height of 5mm.

[0014] As a preferred technical solution for ship welding process, in step S2, when using fillet welding, the preset welding parameters include the following parameters: welding current of 280A, welding voltage of 27V, welding speed of 9.5mm / s, and wire feed speed of 12000mm / min.

[0015] When using vertical fillet welding, the preset welding parameters include the following: welding current of 180A, welding voltage of 23.5V, welding speed of 5mm / s, and wire feed speed of 6400mm / min.

[0016] As a preferred technical solution for ship welding process, when using fillet welding, the preset oscillation parameters include the following parameters: oscillation form is "Z-shaped", oscillation frequency is 1.5Hz, oscillation amplitude is 2mm, and oscillation limit position dwell time is 0.

[0017] When using vertical fillet welding, the preset oscillation parameters include the following parameters: the oscillation pattern is "Z-shaped", the oscillation frequency is 2Hz, the oscillation amplitude is 2.5mm, and the dwell time at the extreme oscillation position is 0.6s.

[0018] As a preferred technical solution for ship welding process, when using fillet welding, the preset oscillation parameters also include the angle between the axis of the welding torch and the horizontal plane being 45°, and the axis of the welding torch being perpendicular to the weld.

[0019] When using vertical fillet welding, the preset oscillation parameters also include the welding torch posture being push welding, the welding torch axis making an angle of 15° with the horizontal plane, and the welding torch axis being located on the angle bisector of the angle between the two welding plates.

[0020] As a preferred technical solution for ship welding process, in step S3, when using fillet welding, the preset arc extinguishing parameters include the following parameters: arc extinguishing current is 220A, arc extinguishing voltage is 22V, and arc extinguishing wire feeding speed is 8000mm / min.

[0021] When using vertical fillet welding, the preset arc extinguishing parameters include the following parameters: arc extinguishing current is 155A, arc extinguishing voltage is 20V, and arc extinguishing wire feeding speed is 4500mm / min.

[0022] As a preferred technical solution for ship welding process, in steps S1, S2 and S3, a protective gas is sprayed onto the welding area, and the gas flow rate of the protective gas is 15L / min-25L / min.

[0023] As a preferred technical solution for ship welding process, the shielding gas supply starts 1 second before arc ignition welding and ends 1.5 seconds after arc extinguishing welding.

[0024] As a preferred technical solution for ship welding process, the protective gas is CO2.

[0025] As a preferred technical solution for ship welding process, the weld gap between two welding plates is 0-2mm.

[0026] On the other hand, a hull is provided, which is welded using the ship welding process described in any of the above schemes.

[0027] The beneficial effects of this invention are as follows:

[0028] This invention provides a ship welding process and hull. When welding a T-joint with a weld leg height of 5mm, the welding torch on the robotic arm initiates the arc welding according to preset arc initiation parameters. When using flat fillet welding, the preset arc initiation parameters include: arc current of 260A, arc voltage of 23.8V, and arc wire feed speed of 11000mm / min. When using vertical fillet welding, the preset arc initiation parameters include: arc current of 170A, arc voltage of 22V, and arc wire feed speed of 5000mm / min. Then, the welding torch performs standard welding according to preset welding parameters. Finally, the welding torch performs arc extinguishing welding according to preset arc extinguishing parameters. During the above welding process, the welding torch oscillates according to preset oscillation parameters to form a weld leg height of 5mm. The welding torch on the robotic arm using the above ship welding process can form a T-joint with a weld leg height of 5mm, ensuring stable weld quality, and the welding speed is more than 20% higher than manual welding.

[0029] Furthermore, performing arc welding according to the aforementioned preset arc-starting parameters ensures a smooth transition of the weld bead at the arc-starting point, guarantees the aesthetics of the arc-starting area, and results in a full weld bead formation, thereby improving the weld bead strength and reliability.

[0030] Finally, the welding torch on the robotic arm can swing during welding. Even if the bevel changes, the welding torch can cover the weld seam when it swings, which can ensure the welding quality of the weld seam and achieve the effect of weld seam correction. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0032] Figure 1 This is a process flow diagram of the ship welding process provided in a specific embodiment of the present invention;

[0033] Figure 2 This is a front view of the welding gun used for fillet welding provided in a specific embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the angle between the welding gun and the weld seam provided in a specific embodiment of the present invention;

[0035] Figure 4 This is a top view of the welding torch used for vertical fillet welding provided in a specific embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the angle between the welding torch and the weld seam when the welding torch is used for vertical fillet welding, according to a specific embodiment of the present invention.

[0037] The markings in the image are as follows:

[0038] 1. Welding plate; 11. Weld seam; 2. Welding torch. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0040] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0043] In existing technologies, arc initiation welding is the first step in the welding process, and its success directly affects the quality and efficiency of the entire welding process. However, in actual operation, if appropriate arc initiation parameters are not selected, various defects often occur at the arc initiation welding position, such as incomplete penetration at the arc initiation position, inability to achieve a smooth transition, unsightly weld formation, and excessive weld reinforcement, which seriously affect the strength and reliability of the welded joint.

[0044] To solve the above problems, such as Figures 1-5 As shown, this embodiment provides a ship welding process. The welding torch 2 is mounted on a robotic arm. The welding torch 2 is used to weld T-joints with a weld leg height of 5mm using the ship welding process. The ship welding process includes the following steps:

[0045] S1. Welding torch 2 initiates arc welding according to preset arc initiation parameters. When using flat fillet welding, the preset arc initiation parameters include the following: arc initiation current of 260A, arc initiation voltage of 23.8V, and arc wire feeding speed of 11000mm / min. When using vertical fillet welding, the preset arc initiation parameters include the following: arc initiation current of 170A, arc initiation voltage of 22V, and arc wire feeding speed of 5000mm / min. Initiating arc welding according to the above preset arc initiation parameters can ensure a smooth transition of the weld leg at the arc initiation welding part, guarantee the aesthetics of the arc initiation part, and ensure a full weld leg formation at the arc initiation part, thereby improving the weld leg strength and reliability.

[0046] S2, Welding torch 2 performs standard welding according to preset welding parameters;

[0047] S3. Welding torch 2 performs arc extinguishing welding according to the preset arc extinguishing parameters;

[0048] In steps S1, S2 and S3, the welding torch 2 oscillates according to preset oscillation parameters to form a weld leg with a height of 5mm. The welding torch 2 on the robotic arm can oscillate during welding. Even if the bevel changes, the welding torch 2 can cover the weld 11 when it oscillates, which can ensure the welding quality of the weld 11 and achieve the effect of correcting the deviation of the weld 11.

[0049] In this embodiment, the welding torch 2 on the robotic arm can form a T-joint with a weld leg height of 5mm using the above-mentioned ship welding process, ensuring stable weld quality 11, and increasing the welding speed by more than 20% compared to manual welding.

[0050] Preferably, in step S2, when using flat fillet welding, the preset welding parameters include the following: welding current of 280A, welding voltage of 27V, welding speed of 9.5mm / s, and wire feed speed of 12000mm / min; when using vertical fillet welding, the preset welding parameters include the following: welding current of 180A, welding voltage of 23.5V, welding speed of 5mm / s, and wire feed speed of 6400mm / min. The robotic arm performs standard welding according to the above preset welding parameters, forming a weld leg with a height of 5mm. Furthermore, the weld 11 has high quality, smoothly transitioning to the arc-starting welding area, ensuring the heat-affected zone hardness meets requirements, and preventing cracking of the weld 11.

[0051] Furthermore, when using flat fillet welding, the preset oscillation parameters include the following: oscillation pattern is "Z-shaped", oscillation frequency is 1.5Hz, oscillation amplitude is 2mm, and dwell time at the extreme oscillation position is 0; when using vertical fillet welding, the preset oscillation parameters include the following: oscillation pattern is "Z-shaped", oscillation frequency is 2Hz, oscillation amplitude is 2.5mm, and dwell time at the extreme oscillation position is 0.6s. Using the above preset oscillation parameters for oscillation welding, regular lateral oscillation is performed on weld 11, making the welding energy distribution on weld 11 more uniform, thereby improving the uniformity of weld 11. Oscillating welding enables good fusion between weld 11 and welding plate 1, thereby improving the strength and stability of the weld.

[0052] In this embodiment, as Figure 2 and Figure 3 As shown, when using fillet welding, the preset oscillation parameters also include the welding torch 2's axis forming a 45° angle with the horizontal plane, and the welding torch 2's axis being perpendicular to the weld 11; Figure 4 and Figure 5As shown, when using vertical fillet welding, the preset oscillation parameters also include the welding torch 2's posture being push welding, the welding torch 2's axis making a 15° angle with the horizontal plane, and the welding torch 2's axis lying on the angle bisector of the angle between the two welding plates 1, wherein the two welding plates 1 are perpendicular, and the welding torch 2's axis makes a 45° angle with the two welding plates 1. A suitable welding torch 2 angle helps reduce defects such as undercut and slag inclusions during welding, improving the weld formation quality and welding efficiency.

[0053] Furthermore, in step S3, when using flat fillet welding, the preset arc extinguishing parameters include the following: arc extinguishing current of 220A, arc extinguishing voltage of 22V, and arc extinguishing wire feed speed of 8000mm / min; when using vertical fillet welding, the preset arc extinguishing parameters include the following: arc extinguishing current of 155A, arc extinguishing voltage of 20V, and arc extinguishing wire feed speed of 4500mm / min. By performing arc extinguishing welding according to the above preset parameters, the arc remains stable during the extinguishing process, ensuring that the crater at the arc-extinguished welding site is filled, and preventing defects such as porosity, cracks, pores, or slag inclusions from occurring at the arc-extinguished welding site.

[0054] Preferably, in steps S1, S2, and S3, a shielding gas is sprayed onto the welding area, with a gas flow rate of 15 L / min to 25 L / min. By spraying the shielding gas, the weld seam 11 is isolated from oxygen and moisture in the air, thereby preventing oxidation and corrosion of the high-temperature metal. This not only maintains the metallic composition and properties of the weld seam 11 but also reduces welding defects such as porosity and cracks, improving the corrosion resistance and durability of the weld seam 11. The shielding gas also provides some protection for the welding torch 2, reducing equipment damage caused by high temperatures and oxidation, and extending the equipment's service life. In this embodiment, the shielding gas is CO2.

[0055] More preferably, the shielding gas supply begins 1 second before arc ignition, ensuring that all air in the nozzle is expelled and that the welding area is within the shielding gas protection zone at the start of welding, thus reducing the impact of air on weld quality. The shielding gas supply ends 1.5 seconds after arc extinguishing, allowing the shielding gas to cool and protect the weld after welding stops. This embodiment improves weld quality while maintaining welding efficiency.

[0056] In this embodiment, the gap between the weld seam 11 between the two welding plates 1 is 0-2mm, and the thickness of the welding plate 1 is 3mm-16mm. Before welding, the area to be welded should be cleaned to ensure that there are no impurities such as oil, moisture, or rust. In this embodiment, a flux-cored welding wire with a diameter of 1.2mm is used.

[0057] This embodiment also provides a ship hull, which is welded using the aforementioned ship welding process. Weld 11 is successfully formed, and the weld leg height of 5mm-6mm meets the requirements. Furthermore, the weld leg is free of defects such as porosity, undercut, inclusions, and cracks. Using this ship welding process, the robot not only significantly improves the forming quality but also increases the speed by more than 20% compared to traditional welding methods.

[0058] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A ship welding process, characterized in that, The welding torch (2) is mounted on the robotic arm. The welding torch (2) is used to weld T-joints with a weld leg height of 5mm using the ship welding process described above. The ship welding process includes the following steps: S1. Welding torch (2) performs arc welding according to the preset arc starting parameters; When using fillet welding, the preset arc starting parameters include the following parameters: arc starting current is 260A, arc starting voltage is 23.8V, and arc starting wire feeding speed is 11000mm / min; When using vertical fillet welding, the preset arc starting parameters include the following parameters: arc starting current of 170A, arc starting voltage of 22V, and arc starting wire feeding speed of 5000mm / min. S2, Welding torch (2) performs standard welding according to preset welding parameters; When using fillet welding, the preset welding parameters include the following parameters: welding current of 280A, welding voltage of 27V, welding speed of 9.5mm / s, and wire feed speed of 12000mm / min. When using vertical fillet welding, the preset welding parameters include the following parameters: welding current of 180A, welding voltage of 23.5V, welding speed of 5mm / s, and wire feed speed of 6400mm / min. S3. Welding torch (2) performs arc extinguishing welding according to the preset arc extinguishing parameters; When using fillet welding, the preset arc extinguishing parameters include the following parameters: arc extinguishing current is 220A, arc extinguishing voltage is 22V, and arc extinguishing wire feeding speed is 8000mm / min. When using vertical fillet welding, the preset arc extinguishing parameters include the following parameters: arc extinguishing current is 155A, arc extinguishing voltage is 20V, and arc extinguishing wire feeding speed is 4500mm / min. In steps S1, S2 and S3, the welding torch (2) oscillates according to preset oscillation parameters to form a weld leg with a weld leg height of 5mm; When using fillet welding, the preset oscillation parameters include the following parameters: the oscillation form is "Z-shaped", the oscillation frequency is 1.5Hz, the oscillation amplitude is 2mm, and the dwell time at the oscillation limit position is 0; the angle between the axis of the welding gun (2) and the horizontal plane is 45°, and the axis of the welding gun (2) is perpendicular to the weld (11). When using vertical fillet welding, the preset oscillation parameters include the following parameters: the oscillation form is "Z-shaped", the oscillation frequency is 2Hz, the oscillation amplitude is 2.5mm, and the dwell time at the extreme position of the oscillation is 0.6s; the posture of the welding gun (2) is push welding, the angle between the axis of the welding gun (2) and the horizontal plane is 15°, and the axis of the welding gun (2) is located on the angle bisector of the angle between the two welding plates (1).

2. The ship welding process according to claim 1, characterized in that, In steps S1, S2 and S3, a protective gas is sprayed onto the welding area, and the gas flow rate is 15L / min - 25L / min.

3. The ship welding process according to claim 2, characterized in that, The shielding gas supply begins 1 second before arc ignition welding and ends 1.5 seconds after arc extinguishing welding.

4. The ship welding process according to claim 2, characterized in that, The protective gas is CO2.

5. The ship welding process according to claim 1, characterized in that, The gap between the weld (11) between the two welding plates (1) is 0-2mm.

6. A ship hull, characterized in that, The hull is welded using the ship welding process described in any one of claims 1-5.

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