Portable double-wire laser TIG (Tungsten Inert Gas) composite welding gun for marine thin plate and application

Abstract

The invention belongs to the technical field of welding, and particularly relates to a portable double-wire laser TIG composite welding gun for a marine thin plate and application of the portable double-wire laser TIG composite welding gun. The portable double-wire laser TIG composite welding gun for the marine thin plate is suitable for manual welding of the marine thin plate of 0.7 mm-6mm within the assembly clearance of 2mm, an intelligent control system and the portable design are combined, so that equipment is easy to operate on site, a welding operator can adjust an interface according to parameters on a handheld handle, and the welding efficiency is improved. The working parameters of the TIG welding gun, the laser welding gun and the welding speed controller are adjusted, path control in the welding process is achieved through the auxiliary movement device, the welding wire cladding amount of single-pass welding can be increased, the production efficiency and welding seam forming are improved to a large extent, and efficient, high-quality and low-deformation welding is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of welding, and in particular relates to a portable double-wire laser TIG composite welding gun for shipboard thin plates and an application thereof. Background Art

[0002] Low-power laser induced TIG arc is a welding technology that uses arc as the main part and laser as the auxiliary part. It significantly improves the energy density of the arc by adding a galvanometer laser with an output power of less than 3000W to induce and enhance the arc. It can maintain the characteristics of the arc welding molten pool under small heat input conditions, ensure the molten pool bridging ability, and improve welding efficiency. It has the technical advantages of energy saving, green and high efficiency, and process adaptability.

[0003] Laser-TIG hybrid welding is a type of laser-arc hybrid welding. Since the welding wire is only subjected to the heat of the arc and laser during the welding process, it has a smaller heat input and no obvious spatter compared to laser welding. The welding process is more stable and continuous. In principle, it is more suitable for welding in complex positions. Currently, there is relatively little research on portable laser-TIG hybrid welding equipment. Summary of the invention

[0004] The invention aims to provide a portable double-wire laser TIG composite welding gun for shipboard thin plates suitable for manual welding of 0.7mm-6mm shipboard thin plates with an assembly gap within 2mm.

[0005] A portable double-wire laser TIG composite welding gun for thin plates for ships, comprising a TIG welding gun, a laser welding gun and a wire feeding device; the laser welding gun is equipped with a handheld handle, the TIG welding gun and the wire feeding device are respectively located on both sides of the laser welding gun, the laser welding gun and the TIG welding gun, and the laser welding gun and the wire feeding tube are connected by adjustable clamps to ensure that the laser welding gun, the TIG welding gun and the wire feeding device are located in the same plane and coincide with the welding path, and the adjustment range of the angle between the laser welding gun and the TIG welding gun is between 45° and 55°, and the adjustment range of the angle between the laser welding gun and the wire feeding device is between 25° and 60°.

[0006] Furthermore, it also includes an auxiliary movement device; the auxiliary movement device includes a roller device and a welding speed controller; the roller device is respectively installed on one side of the TIG welding gun and the laser welding gun, and the welding speed controller is used to adjust the movement speed of the roller device; when in use, support is provided by a handheld handle, and the roller device moves along a preset welding path at a speed set by the welding speed controller.

[0007] Further, the roller device includes a front roller fixing device, a front roller, a rear roller fixing device and a rear roller; the front roller fixing device includes a first rod and a second rod, the second rod is vertically arranged, one end of the first rod is mounted on the TIG welding gun through a clamp, the other end of the first rod is connected to the upper end of the second rod, and the front roller is mounted on the lower end of the second rod; the rear roller fixing device includes a third rod and a fourth rod, the fourth rod is vertically arranged, one end of the third rod is mounted on the laser welding gun through a clamp, the other end of the third rod is connected to the upper end of the fourth rod, and the rear roller is mounted on the lower end of the fourth rod.

[0008] Furthermore, the welding speed controller is installed on the second rod, and the welding speed controller has a built-in drive motor, which is connected to the front roller through a circuit inside the second rod. The front roller serves as an active moving part, and the rear roller serves as a driven moving part.

[0009] Furthermore, a parameter adjustment interface is provided on the handheld handle for displaying and adjusting the working parameters of the TIG welding gun, the laser welding gun and the welding speed controller.

[0010] The invention discloses an application of a portable double-wire laser TIG composite welding gun for shipboard thin plates, which is used for manual welding of 0.7mm-6mm shipboard thin plates with an assembly gap within 2mm.

[0011] Furthermore, during manual welding, adjust the TIG current of the TIG welding gun to 40-200A, the tungsten electrode extension length to 5-8mm, adjust the laser power of the laser welding gun to 1000W-3000W, the shielding gas flow rate to 8-15L / min, adjust the welding speed of the auxiliary motion device to 10-15mm / s, adjust the wire feeding device to make the welding wire accurately point to the center of the molten pool of the composite welding torch, and the wire feeding elbow is 10°-20° away from the marine thin plate.

[0012] Furthermore, during manual welding, the laser incident angle of the laser welding gun is adjusted according to the thickness of the marine thin plate; for marine thin plates of 0.7mm to 4mm, the laser incident angle is 45° to 50°, and for marine thin plates of 4mm to 6mm, the laser incident angle is 50° to 70°.

[0013] Furthermore, during manual welding, the laser beam generated by the laser welding gun reaches the surface of the marine thin plate through the focusing lens and the protective lens. At the same time, the tungsten electrode of the TIG welding gun is connected to the marine thin plate to form an arc. The TIG arc is used to form a molten pool with a larger molten width. The laser achieves deep melting by irradiating the molten pool, forming a "goblet" shaped molten pool, thereby realizing high-speed deep melting welding of marine thin plates below 6 mm.

[0014] The beneficial effects of the present invention are:

[0015] The present invention provides a portable double-wire laser TIG composite welding gun for shipboard thin plates which is suitable for manual welding of 0.7mm-6mm shipboard thin plates with an assembly gap within 2mm. The intelligent control system and portable design are combined to make the equipment easy to operate on site. The welding operator can adjust the working parameters of the TIG welding gun, laser welding gun and welding speed controller according to the parameter adjustment interface on the handheld handle, and use the auxiliary motion device to achieve path control during the welding process, and can increase the wire cladding amount of single-pass welding, thereby greatly improving production efficiency and weld formation, and achieving high-efficiency, high-quality and low-deformation welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The schematic diagram of a portable twin-wire laser TIG composite welding gun for marine thin plates.

[0017] Figure 2 This is an overall model diagram of a portable twin-wire laser TIG composite welding gun for marine thin plates.

[0018] Among them, the figure marks include: TIG welding gun 1, parameter adjustment interface 2, hand-held handle 3, laser control switch 4, front roller fixing device 5, rear roller fixing device 6, wire feeding angle controller 7, laser composite welding gun clamp 8, welding speed controller 9, wire feeding device 10, ceramic nozzle 11, tungsten electrode 12, front roller 13, rear roller 14. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings.

[0020] The present invention designs a portable double-wire laser TIG composite welding gun for thin plates for ships, which integrates double-wire laser-non-melting inert gas shielded arc welding (TIG), and can realize efficient, precise and movable welding operations in complex components and key positions of ship structures. The main features include handheld welding gun design, fixture design, laser focus control module, integrated switch and double-wire independent control device. In view of the current problems of low efficiency of handheld laser wire feeding, narrow laser melting width and poor weld formation, the present invention combines the high energy density and concentrated heat source characteristics of laser welding to achieve the effect of deep melting, and combines the high melting width and low cost characteristics of TIG welding to effectively achieve deep melting and good adaptability to working conditions, thereby reducing the problems of difficult welding and poor forming at key positions. The portable design makes the equipment easy to operate on site, the integrated switch can facilitate the simplicity of the equipment during use, simplify the operation mode of the welder to ensure the stability and continuity of the welding process, and determine the range of process parameters through process tests. The equipment is suitable for the welding needs of thin plates at key positions in the fields of ships, aerospace, etc., and significantly improves production efficiency and welding quality.

[0021] like Figure 1 and Figure 2 As shown, a portable double-wire laser TIG composite welding gun for marine thin plates includes a TIG welding gun, a laser welding gun, a wire feeding device and an auxiliary motion device; the laser welding gun is equipped with a handheld handle, the TIG welding gun and the wire feeding device are respectively located on both sides of the laser welding gun, and the laser welding gun and the TIG welding gun, as well as the laser welding gun and the wire feeding tube are connected by adjustable clamps to ensure that the laser welding gun, the TIG welding gun and the wire feeding device are located in the same plane and coincide with the welding path, and the adjustment range of the angle between the laser welding gun and the TIG welding gun is between 45° and 55°, which can be adjusted according to the actual welding situation The angle can be adjusted in small increments; the adjustment range of the angle between the laser welding gun and the wire feeding device is between 25° and 60°; the auxiliary motion device includes a roller device and a welding speed controller; the roller devices are respectively installed on one side of the TIG welding gun and the laser welding gun, and the welding speed controller is used to adjust the movement speed of the roller device; a parameter adjustment interface is provided on the handheld handle for displaying and adjusting the working parameters of the TIG welding gun, laser welding gun and welding speed controller; when in use, the handheld handle provides support, and the roller device moves along the preset welding path at the speed set by the welding speed controller.

[0022] The roller device includes a front roller fixing device, a front roller, a rear roller fixing device and a rear roller; the front roller fixing device includes a first rod and a second rod, the second rod is arranged vertically, one end of the first rod is mounted on the TIG welding gun through a clamp, the other end of the first rod is connected to the upper end of the second rod, and the front roller is mounted on the lower end of the second rod; the rear roller fixing device includes a third rod and a fourth rod, the fourth rod is arranged vertically, one end of the third rod is mounted on the laser welding gun through a clamp, the other end of the third rod is connected to the upper end of the fourth rod, and the rear roller is mounted on the lower end of the fourth rod. The welding speed controller is mounted on the second rod, the welding speed controller has a built-in drive motor, the drive motor is connected to the front roller through the circuit inside the second rod, the front roller is used as an active moving part, and the rear roller is used as a driven moving part.

[0023] The present invention integrates the laser welding gun and the TIG welding gun and adds a hand-held grip to the laser welding gun by designing a portable integrated composite welding gun; the relative positions of the double guns and the welding wire are determined according to process tests, and a fixture is designed to fix the two welding guns and adjust the relative angles, so as to facilitate debugging according to on-site requirements during the actual welding process; a laser focus controller and a matching roller device are introduced to facilitate better determination of the laser defocus amount and the stability of the welding gun movement according to welding requirements during the welding process. The optimal process window for the relative position of the welding gun is determined through process tests to achieve efficient and high-quality welding. The portable integrated composite welding gun of the present invention has the advantages of compact structure, convenient operation, strong adaptability, etc., and is suitable for a variety of welding application scenarios.

[0024] The portable double-wire laser TIG composite welding gun for shipboard thin plates provided by the invention is used for manual welding of 0.7mm-6mm shipboard thin plates with an assembly gap within 2mm.

[0025] During manual welding, in order to better achieve the coupling between laser and TIG, adjust the TIG current of the TIG welding gun to 40-200A, the tungsten electrode extension length to 5-8mm, the laser power of the laser welding gun to 1000W-3000W, the shielding gas flow rate to 8-15L / min, and the welding speed of the auxiliary motion device to 10-15mm / s; adjust the wire feeding device to make the welding wire accurately point to the center of the molten pool of the composite welding torch, and the wire feeding elbow is 10°-20° away from the marine thin plate. According to actual needs, select a welding wire with a diameter of 1.2, 1.6 or 2.0, and ensure that the welding wire can enter the groove of the copper nozzle of the laser welding gun; the laser incident angle of the laser welding gun is adjusted according to the thickness of the marine thin plate; for marine thin plates of 0.7mm-4mm, the laser incident angle is 45°-50°, and for marine thin plates of 4mm-6mm, the laser incident angle is 50°-70°.

[0026] During the welding process, according to different plate types, such as flat plate welding, front and rear rollers can be added to facilitate the movement of the welding gun and simplify the welder's operation. When welding curved plates, only the rear roller needs to be added to assist the operation. Select the welding mode through the parameter adjustment interface on the handheld grip. The welding mode controls the thickness range (1-6mm) and plate type (stainless steel, carbon steel). Adjust the corresponding current, voltage, laser power and wire feeding speed according to the needs, and then adjust the roller travel speed.

[0027] During manual welding, the laser beam generated by the laser welding gun reaches the surface of the marine thin plate through the focusing lens and the protective lens. At the same time, the tungsten electrode of the TIG welding gun is connected to the marine thin plate to form an arc. The TIG arc is used to form a molten pool with a larger molten width. The laser achieves deep melting by irradiating the molten pool, forming a "goblet" shaped molten pool, realizing high-speed deep melting welding of marine thin plates below 6 mm.

[0028] Observe the melting mode and cladding effect of the welding wire. Because the portable device introduces a real-time adjustment control module, a preset process data package can be set according to the material composition and thickness based on the database built in the previous process test. During the welding process, the process parameters are adjusted in real time according to the melting efficiency of the welding wire and the weld formation. Perform double-wire laser arc hybrid welding, and the laser beam and arc are coupled to form a eutectic pool composite heat source for welding. Start the roller device to make the entire welding gun weld along the surface of the plate at the preset walking speed.

[0029] The present invention aims to solve the problems of heavy equipment, difficult relative posture adjustment and poor composite effect of laser arc hybrid welding guns, and proposes a portable, real-time control and process parameter package integrated solution, aiming to improve the adaptability of laser arc hybrid welding guns to working conditions, ease of operation and weld quality in actual production applications. Due to the introduction of an independent welding wire adjustment device and a roller control system, the limitation of traditional handheld welding guns that the welding speed needs to be controlled by the wire feeding speed is solved. The path control in the welding process is realized by means of motor assistance and process database guidance, and the amount of welding wire cladding in single-pass welding can be increased, which greatly improves production efficiency and weld formation. It is suitable for base welding and cover welding of different plate thicknesses, and has good process stability and adaptability to working conditions.

[0030] The present invention can be equipped with a PID closed-loop control system for current, voltage and wire feeding, which can accurately adjust the welding parameters. The real-time monitoring system transmits the process parameters (such as current, voltage and wire feeding speed, etc.) generated during the welding process to the parameter adjustment interface on the handheld handle, and the welding operator can view and adjust the parameters in real time according to the welding phenomenon. The device of the present invention is light in weight, easy to carry, and suitable for application in a variety of welding scenarios. By integrating the process database and the laser parameter adaptive control system, the laser power and laser defocus amount can be automatically adjusted according to the welding conditions to ensure that the laser reaches the optimal welding mode during the welding process. By integrating the power switch and the control module, the synchronous adjustment of the laser and TIG welding parameters can be achieved to meet a variety of welding requirements.

[0031] The parameter adjustment interface is integrated into the handheld grip and is designed as a portable high-brightness LCD display that can display key parameters of the welding process in real time, including current, voltage, wire feed speed, laser power, and defocus. Welders can monitor the welding status through an intuitive interface and quickly adjust parameters when necessary. The parameter adjustment interface also has anti-glare and dust-proof functions to adapt to various complex welding environments, ensuring that operators can clearly read information even outdoors or in low light conditions. At the same time, the parameter adjustment interface can ensure the real-time and accuracy of data transmission through seamless connection with the control system, thereby improving the efficiency and quality of welding operations.

[0032] The portable double-wire laser TIG composite welding gun for marine thin plates provided by the present invention is suitable for manual welding of 0.7mm-6mm marine thin plates with an assembly gap within 2mm, and can adapt to the welding of complex structures such as flat plates and curved plates. Combined with an intelligent control system and a portable design, efficient, high-quality and low-deformation welding is achieved.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A portable double-wire laser TIG composite welding gun for marine thin plates, characterized by: It includes a TIG welding gun, a laser welding gun and a wire feeding device; the laser welding gun is equipped with a handheld handle, the TIG welding gun and the wire feeding device are respectively located on both sides of the laser welding gun, and the laser welding gun and the TIG welding gun, as well as the laser welding gun and the wire feeding tube are connected by adjustable clamps to ensure that the laser welding gun, the TIG welding gun and the wire feeding device are located in the same plane and coincide with the welding path, and the adjustment range of the angle between the laser welding gun and the TIG welding gun is between 45° and 55°, and the adjustment range of the angle between the laser welding gun and the wire feeding device is between 25° and 60°.

2. A portable double-wire laser TIG composite welding gun for marine thin plates according to claim 1, characterized in that: It also includes an auxiliary motion device; the auxiliary motion device includes a roller device and a welding speed controller; the roller device is respectively installed on one side of the TIG welding gun and the laser welding gun, and the welding speed controller is used to adjust the movement speed of the roller device; when in use, support is provided by a handheld handle, and the roller device moves along a preset welding path at a speed set by the welding speed controller.

3. A portable double-wire laser TIG composite welding gun for marine thin plates according to claim 2, characterized in that: The roller device includes a front roller fixing device, a front roller, a rear roller fixing device and a rear roller; the front roller fixing device includes a first rod and a second rod, the second rod is arranged vertically, one end of the first rod is mounted on the TIG welding gun through a clamp, the other end of the first rod is connected to the upper end of the second rod, and the front roller is mounted on the lower end of the second rod; the rear roller fixing device includes a third rod and a fourth rod, the fourth rod is arranged vertically, one end of the third rod is mounted on the laser welding gun through a clamp, the other end of the third rod is connected to the upper end of the fourth rod, and the rear roller is mounted on the lower end of the fourth rod.

4. A portable double-wire laser TIG composite welding gun for marine thin plates according to claim 3, characterized in that: The welding speed controller is installed on the second rod. The welding speed controller has a built-in drive motor. The drive motor is connected to the front roller through a circuit inside the second rod. The front roller serves as an active moving part and the rear roller serves as a driven moving part.

5. The portable double-wire laser TIG composite welding gun for marine thin plates according to claim 2 is characterized by: The handheld handle is provided with a parameter adjustment interface for displaying and adjusting the working parameters of the TIG welding gun, the laser welding gun and the welding speed controller.

6. An application of the portable double-wire laser TIG composite welding gun for marine thin plates as claimed in claim 2, characterized in that: Used for manual welding of 0.7mm~6mm marine thin plates with assembly gap within 2mm.

7. The application of a portable double-wire laser TIG composite welding gun for marine thin plates according to claim 6, characterized in that: During manual welding, adjust the TIG current of the TIG welding gun to 40-200A and the tungsten electrode extension length to 5-8mm, adjust the laser power of the laser welding gun to 1000W-3000W, the shielding gas flow rate to 8-15L / min, adjust the welding speed of the auxiliary motion device to 10-15mm / s, adjust the wire feeding device to make the welding wire accurately point to the center of the molten pool of the composite welding torch, and the wire feeding elbow should be 10°-20° away from the marine thin plate.

8. The application of a portable double-wire laser TIG composite welding gun for marine thin plates according to claim 7, characterized in that: During manual welding, the laser incident angle of the laser welding gun is adjusted according to the thickness of the marine thin plate; for marine thin plates of 0.7mm to 4mm, the laser incident angle is 45° to 50°, and for marine thin plates of 4mm to 6mm, the laser incident angle is 50° to 70°.

9. The application of a portable double-wire laser TIG composite welding gun for marine thin plates according to claim 8, characterized in that: During manual welding, the laser beam generated by the laser welding gun reaches the surface of the marine thin plate through the focusing lens and the protective lens. At the same time, the tungsten electrode of the TIG welding gun is connected to the marine thin plate to form an arc. The TIG arc is used to form a molten pool with a larger molten width. The laser achieves deep melting by irradiating the molten pool, forming a "goblet" shaped molten pool, realizing high-speed deep melting welding of marine thin plates below 6 mm.

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