Apparatus and method for gap welding of titanium alloy plates

Abstract

This invention relates to an apparatus and method for gap welding of titanium alloy plates, comprising a welding torch and a rotating device. The welding torch includes a housing, a guide fluid, a tungsten electrode, a hollow tungsten electrode, and a laser emitter. The tungsten electrode is disposed at the end of the guide fluid and connected to the hollow tungsten electrode. The laser beam emitted by the laser emitter is redirected and coaxial with the hollow tungsten electrode. The rotating device includes a support platform, a rotating support component, and a movable base. The rotating support component is connected to both the support platform and the movable base. The support platform carries the titanium alloy plates to be welded, with a gap between the two titanium alloy plates. The rotating support component can extend, retract, and rotate along its own height direction. The movable base can drive the support platform to move along the length of the gap formed by the titanium alloy plates to be welded, thereby increasing the heating range. The laser beam emitted by the laser and the hollow tungsten electrode melt the welding wire, and the deposited metal fills along the length of the gap. After the molten pool cools, a solid weld is formed, thus achieving the connection of the two titanium alloy plates to be welded.

Description

Technical Field

[0001] This invention relates to the field of composite welding technology, and more specifically, to an apparatus and method for gap welding of titanium alloy plates. Background Technology

[0002] Titanium alloy plates require high weld stability, joint toughness, and minimal weld spatter. Laser narrow-gap welding or filler wire welding is commonly used for titanium alloy plates. While laser welding can achieve deep penetration, the heat source's effective range is too small, easily leading to poor sidewall fusion. Furthermore, due to the small diameter of the laser beam, the coupling performance with the welding wire is easily affected by the wire itself, operator error, or external factors, resulting in wire sticking and other issues that negatively impact joint weld quality. In contrast, laser-assisted combined welding with metal arc welding produces significant spatter, and the droplet transfer negatively affects weld stability.

[0003] Based on the above situation, there is an urgent need to provide a device for gap welding of titanium alloy plates, which can at least solve the above technical problems. Summary of the Invention

[0004] This application provides a device for gap welding of titanium alloy plates, which can assist workers in welding titanium alloy plates, increase the heating range of titanium alloy plates, and prevent the gap sidewalls of two titanium alloy plates to be welded from not being fused.

[0005] On one hand, this application provides an apparatus for welding titanium alloy plates, comprising: a welding torch, the welding torch including a housing, a guide fluid, a tungsten electrode, a hollow tungsten electrode, and a laser emitter, the tungsten electrode being disposed at the end of the guide fluid and connected to the hollow tungsten electrode; a laser emitter, the laser beam emitted by the laser emitter being redirected and coaxial with the hollow tungsten electrode; a rotating device including a support platform, a rotating support component, and a movable base, the rotating support component being connected to the support platform and the movable base respectively, the rotating support component being able to extend and retract along its own height direction, the rotating support component being able to drive the support platform to rotate, the support platform being used to support two titanium alloy plates to be welded, a ceramic pad being disposed between the titanium alloy plates and the support platform, the two titanium alloy plates having a gap, the laser beam emitted by the laser emitter and the hollow tungsten electrode melting welding wire filling the gap between the two titanium alloy plates to be welded.

[0006] In some optional embodiments, the rotating support component includes a first support rod, a drive assembly, and a second support rod. The first support rod is provided with a mounting base, the drive assembly is disposed on the mounting base, one end of the second support rod is connected to the mounting base, and the other end of the second support rod is connected to the support platform.

[0007] In some alternative embodiments, the drive assembly includes a motor, an output shaft, and a coupling. The motor is mounted on the mounting base, one end of the output shaft is connected to the motor, the other end of the output shaft is connected to the coupling, one end of the second support rod is connected to the coupling, and the other end of the second support rod is connected to the support platform.

[0008] In some alternative embodiments, the second support rod includes a first sub-support rod and a second sub-support rod, one end of the first sub-support rod is connected to the coupling, the other end of the first sub-support rod is connected to the second sub-support rod, and the other end of the second sub-support rod is connected to the support platform.

[0009] In some alternative embodiments, the first support rod is an automatically telescopic rod.

[0010] On the other hand, this application provides a method for welding titanium alloy plates, using the equipment for welding titanium alloy plates as described in any of the above claims, comprising at least the following steps: a welding torch, the welding torch comprising a housing, a fluid guide, a tungsten electrode, a hollow tungsten electrode, and a laser emitter, the tungsten electrode being disposed at the end of the fluid guide, the tungsten electrode being connected to the hollow tungsten electrode, and the laser beam emitted by the laser emitter being redirected and coaxial with the hollow tungsten electrode; a rotating device comprising a support platform, a rotating support component, and a movable base, the rotating support component being connected to the support platform and the movable base respectively, the rotating support component being capable of extending and retracting along its own height direction, the rotating support component being capable of driving the support platform to rotate, the support platform being used to support two titanium alloy plates to be welded, the two titanium alloy plates having a gap, the laser beam emitted by the laser emitter and the hollow tungsten electrode melting the welding wire to fill the gap between the two titanium alloy plates to be welded.

[0011] In some optional embodiments, the step of adjusting the shape of the gap between the two titanium alloy plates to be welded includes forming a gap between the sidewalls of the two titanium alloy plates to be welded; adjusting the bevel shape of the two titanium alloy plates to be welded such that the bevel of one of the titanium alloy plates to be welded has a certain inclination angle and the bevel of the other titanium alloy plate to be welded is vertical, or making the bevels of both titanium alloy plates to be welded vertical.

[0012] In some optional embodiments, the step of adjusting the position of the two titanium alloy plates to be welded so that the gap between the two titanium alloy plates to be welded is at a preset position includes aligning the central axis of the gap between the two titanium alloy plates to be welded with the center of the support platform.

[0013] In some optional embodiments, when the bevels of the two titanium alloy plates to be welded are vertical, the gap between the two titanium alloy plates to be welded is adjusted to 12mm, and the value of D is 4mm; the path of the laser beam rotating relative to the two titanium alloy plates to be welded is symmetrical about the center line of the gap between the two titanium alloy plates to be welded.

[0014] In some optional embodiments, when one of the titanium alloy plates to be welded has a certain tilt angle and the other titanium alloy plate to be welded has a vertical bevel, the gap between the two titanium alloy plates to be welded is adjusted to 10 mm, and the value of D is 2 mm. The path of the laser beam rotating relative to the two titanium alloy plates to be welded is asymmetrical about the center line of the gap between the two titanium alloy plates to be welded.

[0015] Compared with the prior art, the present invention has the following technical advantages:

[0016] 1. This application provides an apparatus for gap welding of titanium alloy plates. The apparatus includes a welding torch and a rotating device. The welding torch includes a housing, a guide fluid, a tungsten electrode, a hollow tungsten electrode, and a laser emitter. The tungsten electrode is disposed at the end of the guide fluid and connected to the hollow tungsten electrode. The laser beam emitted by the laser emitter is redirected and coaxial with the hollow tungsten electrode. The rotating device includes a support platform, a rotating support component, and a movable base. The rotating support component is connected to the support platform and the movable base respectively. The support platform is used to support two titanium alloy plates to be welded. A ceramic pad is disposed between the titanium alloy plates to be welded and the support platform to prevent the laser beam from melting the support platform. A gap is formed between the two titanium alloy plates. The rotating support component can drive the support platform to rotate horizontally. The rotating support component can automatically extend and retract with the direction of rotation to increase the heating range. The movable base can drive the support platform to move along the length direction of the gap formed by the titanium alloy plates to be welded. The laser beam emitted by the laser and the hollow tungsten electrode melt the welding wire. The deposited metal fills along the length direction of the gap. After the molten pool cools, a solid weld is formed, thereby achieving the connection of the two titanium alloy plates to be welded.

[0017] The apparatus for gap welding of titanium alloy plates provided in this application, which combines laser and electric arc welding, greatly increases the heat source area and significantly improves the problems of wire sticking, top wire, and poor fusion of the sidewalls of the titanium alloy to be welded. The gap welding effect of titanium alloy plates using laser and electric arc combined welding is even better.

[0018] The apparatus for gap welding of titanium alloy plates provided in this application uses a rotating device to rotate the titanium alloy plate to be welded while the welding torch and welding wire remain stationary. The laser and electric arc are coaxially combined with filler wire welding, which increases the penetration depth of the sidewall of the titanium alloy plate to be welded and promotes the fusion of the sidewall of the titanium alloy plate to be welded. Compared with the centrifugal force on the rotating device, the rotating titanium alloy plate to be welded and the molten pool inside the titanium alloy plate to be welded are affected by the centripetal force, which increases the stirring effect of the molten pool and can also improve the poor fusion of the sidewall of the titanium alloy plate to be welded. At the same time, compared with the off-axis combination, its heat source effect is more concentrated, uniform and efficient.

[0019] The apparatus for gap welding of titanium alloy plates provided in this application ingeniously combines laser and electric arc coaxial filler wire welding, rotating laser, and rotating electric arc in the gap of titanium alloy plates, which can achieve high-quality and high-efficiency welding of titanium alloy plates.

[0020] 2. This application provides a method for welding titanium alloy plates, the method comprising: removing the oxide layer on the surface of the titanium alloy plate; processing the bevel shape of the welding positions of two titanium alloy plates to be welded; adjusting the size of the gap between the two titanium alloy plates to be welded according to the bevel shape of the two titanium alloy plates to be welded; adjusting the position of the two titanium alloy plates to be welded so that the gap between the two titanium alloy plates to be welded is at a preset position; adjusting the position of the welding torch so that the horizontal distance D between the center of the laser beam and the center line of the length extension direction of the gap between the titanium alloy plates to be welded is a preset value; and driving the two titanium alloy plates to be welded... The titanium alloy plates to be welded rotate and move up and down. The path of the laser beam relative to the two titanium alloy plates to be welded is symmetrical or asymmetrical about the center line of the gap between the two titanium alloy plates to be welded. The rotating support component can drive the support platform to rotate horizontally. The rotating support component can automatically extend and retract with the direction of rotation to increase the heating range. The moving base can drive the support platform to move along the length direction of the gap formed by the titanium alloy plates to be welded. The laser beam emitted by the laser and the hollow tungsten electrode melt the welding wire. The deposited metal fills along the length direction of the gap. After the molten pool cools, a solid weld is formed, thus realizing the connection of the two titanium alloy plates to be welded. Attached Figure Description

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 A schematic diagram of the structure of the apparatus for gap welding of titanium alloy plates provided in an embodiment of the present invention is shown;

[0023] Figure 2 This is a schematic diagram of the trajectory of a laser beam relative to a titanium alloy plate according to an embodiment of the present invention;

[0024] Figure 3This is a schematic diagram of the trajectory of the laser beam relative to the titanium alloy plate according to another embodiment of the present invention;

[0025] Figure 4 For the present invention Figure 2 A schematic diagram showing the relative positions of the welding torch to the two titanium alloy plates to be welded in the provided embodiment;

[0026] Figure 5 For the present invention Figure 3 A schematic diagram showing the relative positions of the welding torch to the two titanium alloy plates to be welded in the provided embodiment;

[0027] Figure 6 This is a schematic diagram of the structure of a rotating support component provided in another embodiment of the present invention.

[0028] in, Figures 1-6 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0029] 1-Welding torch includes a housing; 11-Support platform; 12-Rotating support component; 121-First support rod; 122-Second support rod; 123-First sub-support rod; 124-Second sub-support rod; 13-Moving base; 14-Moving component; 2-Fluid guide; 3-Tungsten electrode; 4-Hollow tungsten electrode. Detailed Implementation

[0030] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0032] Laser narrow-gap welding is commonly used for self-fusion or filler wire welding of titanium alloy plates. Although laser welding can achieve a relatively deep penetration, the heat source's effective range is too small, which can easily lead to poor sidewall fusion. At the same time, due to the small diameter of the laser beam, the coupling performance with the welding wire is easily affected by the welding wire itself, operation, or external factors, which can easily lead to phenomena such as wire sticking and wire tipping, thus affecting the welding quality of the joint.

[0033] Based on the above situation, there is an urgent need to provide a flatness measuring device that can at least solve the above technical problems.

[0034] This application provides a device for gap welding of titanium alloy plates, which can assist workers in welding titanium alloy plates, increase the heating range of titanium alloy plates, and prevent the gap sidewalls of two titanium alloy plates to be welded from not being fused.

[0035] This application provides a device for welding titanium alloy plates, such as... Figure 1 As shown, the device includes: a welding torch, which includes a housing 1, a guide fluid 2, a tungsten electrode 3, a hollow tungsten electrode 4, and a laser emitter. The tungsten electrode 3 is disposed at the end of the guide fluid 2, and the tungsten electrode 3 is connected to the hollow tungsten electrode 4; a laser emitter, whose laser beam is diverted and coaxial with the hollow tungsten electrode 4; and a rotating device 1, which includes a support platform 11, a rotating support component 12, and a movable base 13. The rotating support component 12 is connected to the support platform 11 and the movable base 13, and can extend and retract along its own height. The rotating support component 12 can drive the support platform 11 to rotate. The support platform 11 is used to support two titanium alloy plates to be welded. A ceramic pad is disposed between the titanium alloy plates and the support platform 11. A gap is provided between the two titanium alloy plates. The laser beam emitted by the laser emitter and the melting welding wire of the hollow tungsten electrode 4 fill the gap between the two titanium alloy plates to be welded.

[0036] Specifically, this application targets titanium alloy plates with a thickness of 5mm to 120mm, particularly 20mm to 80mm, and specifically, the gap between the titanium alloy plates to be welded is 8-12mm. The device includes a welding torch and a rotating device. The welding torch includes a housing 1, a guide fluid 2, a tungsten electrode 3, a hollow tungsten electrode 4, and a laser emitter. The tungsten electrode 3 is disposed at the end of the guide fluid 2, and the tungsten electrode 3 is connected to the hollow tungsten electrode 4. The laser beam emitted by the laser emitter is redirected and coaxial with the hollow tungsten electrode 4. The rotating device includes a support platform 11, a rotating support component 12, and a movable base 13. The rotating support component 12 is connected to both the support platform 11 and the movable base 13. The support platform 11 is used to support the plates to be welded. Two titanium alloy plates are joined together, with a gap between them. A ceramic pad is placed between the titanium alloy plate to be welded and the support platform 11 to prevent the laser beam from melting the support platform 11. The gap between the two titanium alloy plates allows the rotating support component 12 to drive the support platform 11 to rotate horizontally. The rotating support component 12 can automatically extend and retract with the direction of rotation to increase the heating range. The movable base 13 can drive the support platform 11 to move along the length of the gap between the titanium alloy plates to be welded. The laser beam emitted by the laser and the hollow tungsten electrode 4 melt the welding wire. The deposited metal fills along the length of the gap. After the molten pool cools, a solid weld is formed, thus connecting the two titanium alloy plates to be welded.

[0037] Furthermore, the movable base 13 includes a base plate and a movable component. One end of the rotating support component 12 is disposed on the base plate, and the other end is disposed on the support platform 11. The movable component is disposed on the base plate and is a roller or a guide rail assembly.

[0038] In some optional embodiments, the rotating support component 12 includes a first support rod 121, a drive assembly, and a second support rod 122. One end of the first support rod 121 is connected to the movable base 13, and the other end of the first support rod 121 is provided with a mounting seat. The drive assembly is provided on the mounting seat. One end of the second support rod 122 is connected to the mounting seat, and the other end of the second support rod 122 is connected to the support platform 11.

[0039] Specifically, the first support rod 121 is an automatic telescopic rod, capable of extending and retracting along its length. A drive assembly is mounted on the first support rod 121 via a mounting base, driving the second support rod 122 to rotate. During this rotation, the second support rod 122 drives the support platform 11 to rotate. The support platform 11 supports two titanium alloy plates to be welded, with a gap between them. A ceramic pad is placed between the titanium alloy plates to be welded and the support platform 11 to prevent the laser beam from melting the support platform 11. The rotating support component 12 can drive the support platform 11 to rotate horizontally, automatically extending and retracting with the direction of rotation to increase the heating range. The movable base 13 can move the support platform 11 along the length of the gap between the titanium alloy plates to be welded. The laser beam emitted by the laser and the hollow tungsten electrode 4 melt the welding wire, and the deposited metal fills along the length of the gap. After the molten pool cools, a solid weld is formed, thus connecting the two titanium alloy plates to be welded.

[0040] In some alternative embodiments, the drive assembly includes a motor, an output shaft, and a coupling. The motor is mounted on a mounting base, one end of the output shaft is connected to the motor, the other end of the output shaft is connected to the coupling, one end of the second support rod is connected to the coupling, and the other end of the second support rod is connected to the support platform.

[0041] Specifically, the rotating support component 12 includes a first support rod 121, a drive assembly, and a second support rod 122. The drive assembly includes a motor, an output shaft, and a coupling. One end of the first support rod 121 is connected to the movable base 13, and the other end of the first support rod 121 is provided with a mounting seat. One end of the output shaft is connected to the motor, and the other end of the output shaft is connected to the coupling. One end of the second support rod is connected to the coupling, and the other end of the second support rod is connected to the support platform. The first support rod 121 is an automatically telescopic rod, capable of extending and retracting along its own length. The drive assembly is mounted on the first support rod 121 via the mounting seat. The motor drives the second support rod 122 to rotate, and the second support rod 122, during its rotation, drives the support platform 11 to rotate. The support platform 11 is used to support two titanium alloy plates to be welded. The two titanium alloy plates are separated by a gap. A ceramic pad is placed between the titanium alloy plates to be welded and the support platform 11 to prevent the laser beam from melting the support platform 11. The two titanium alloy plates are separated by a gap. The rotating support component 12 can drive the support platform 11 to rotate horizontally. The rotating support component 12 can automatically extend and retract with the direction of rotation to increase the heating range. The movable base 13 can drive the support platform 11 to move along the length direction of the gap formed by the titanium alloy plates to be welded. The laser beam emitted by the laser and the hollow tungsten electrode 4 melt the welding wire. The deposited metal fills along the length direction of the gap. After the molten pool cools, a solid weld is formed, thus realizing the connection of the two titanium alloy plates to be welded.

[0042] In some optional embodiments, the second support rod 122 includes a first sub-support rod 123 and a second sub-support rod 124. One end of the first sub-support rod 123 is connected to a coupling, the other end of the first sub-support rod 123 is connected to the second sub-support rod 124, and the other end of the second sub-support rod 124 is connected to the support platform 11.

[0043] Specifically, the first sub-support rod 123 and the second sub-support rod 124 are arranged vertically. The rotating support component 12 includes a first support rod 121, a drive assembly, and a second support rod 122. The drive assembly includes a motor, an output shaft, and a coupling. One end of the first support rod 121 is connected to the movable base 13, and the other end of the first support rod 121 is provided with a mounting seat. One end of the output shaft is connected to the motor, and the other end of the output shaft is connected to the coupling. One end of the second support rod is connected to the coupling, and the other end of the second support rod is connected to the support platform. The first support rod 121 is an automatically telescopic rod, capable of extending and retracting along its own length. The drive assembly is mounted on the first support rod 121 via the mounting seat. The motor drives the second support rod 122 to rotate, and the second support rod 122, during its rotation, drives the support platform 11 to rotate. The support platform 11 is used to support two titanium alloy plates to be welded. The two titanium alloy plates are separated by a gap. A ceramic pad is placed between the titanium alloy plates to be welded and the support platform 11 to prevent the laser beam from melting the support platform 11. The two titanium alloy plates are separated by a gap. The rotating support component 12 can drive the support platform 11 to rotate horizontally. The rotating support component 12 can automatically extend and retract with the direction of rotation to increase the heating range. The movable base 13 can drive the support platform 11 to move along the length direction of the gap formed by the titanium alloy plates to be welded. The laser beam emitted by the laser and the hollow tungsten electrode 4 melt the welding wire. The deposited metal fills along the length direction of the gap. After the molten pool cools, a solid weld is formed, thus realizing the connection of the two titanium alloy plates to be welded.

[0044] In some alternative embodiments, the first support rod 123 is an automatically telescopic rod. The rotating support component 12 is capable of extending and retracting along its own height.

[0045] This application also provides a method for welding titanium alloy plates, using the equipment mentioned in any of the above-mentioned methods, comprising at least the following steps: removing the oxide layer from the surface of the titanium alloy plate; processing the bevel shape of the welding position of each of the two titanium alloy plates to be welded; adjusting the size of the gap between the two titanium alloy plates to be welded according to the bevel shape; adjusting the position of the two titanium alloy plates to be welded so that the gap between the two titanium alloy plates to be welded is at a preset position; adjusting the position of the welding torch so that the horizontal distance D between the center of the laser beam and the center line of the length extension direction of the gap between the titanium alloy plates to be welded is a preset value; activating the rotating device, the rotating support component 12 can drive the support platform 11 to rotate horizontally, the rotating support component 12 can automatically extend and retract with the rotation direction to increase the heating range, the moving base 13 can drive the support platform 11 to move along the length direction of the gap formed by the titanium alloy plates to be welded, the laser beam emitted by the laser and the hollow tungsten electrode 4 melt the welding wire, the deposited metal fills along the length direction of the gap, and after the molten pool cools, a solid weld is formed, thereby achieving the connection of the two titanium alloy plates to be welded.

[0046] In some optional embodiments, the step of adjusting the shape of the gap between the two titanium alloy plates to be welded includes forming a gap between the sidewalls of the two titanium alloy plates to be welded; adjusting the bevel shape of the two titanium alloy plates to be welded such that the bevel of one of the titanium alloy plates to be welded has a certain inclination angle and the bevel of the other titanium alloy plate to be welded is vertical, or making the bevels of both titanium alloy plates to be welded vertical.

[0047] In some optional embodiments, the step of adjusting the position of the two titanium alloy plates to be welded so that the gap between the two titanium alloy plates to be welded is at a preset position includes aligning the central axis of the gap between the two titanium alloy plates to be welded with the center of the support platform.

[0048] In some optional embodiments, when the bevels of the two titanium alloy plates to be welded are vertical, the gap between the two titanium alloy plates to be welded is adjusted to 12mm, and the value of D is 4mm; the path of the laser beam rotating relative to the two titanium alloy plates to be welded is symmetrical about the center line of the gap between the two titanium alloy plates to be welded.

[0049] Specifically, such as Figure 2 and Figure 4As shown, for example, the thickness of the titanium alloy plates to be welded is 70mm. Two 70mm thick titanium alloy plates are ground with a grinding wheel to remove the surface oxide film. The workpiece surfaces are then cleaned with acetone and alcohol in sequence and dried. The included angle between the center of the hollow tungsten electrode 4 and the center of the laser beam is 20°. A 12mm gap is left between the titanium alloy plates to be welded. A ceramic pad is placed under each titanium alloy plate and fixed to the support platform 11. The bottom centers of the two titanium alloy plates to be welded coincide with the center of the rotating device. The bevel shapes of the two titanium alloy plates to be welded are adjusted, with one plate having a certain tilt angle and the other having a vertical bevel. The rotating device is moved according to the preset rotation path, rotation amplitude, and movement speed and direction in the gap length direction. The rotation path is circular, the rotation amplitude is 8mm, and the movement speed in the gap length direction is 10mm / s. The horizontal distance D between the center of the laser beam and the center line of the gap between the titanium alloy plates to be welded is adjusted to 4mm. The laser beam rotates symmetrically and moves longitudinally along the center line of the gap between the titanium alloy plates to be welded. The laser beam moves the titanium alloy plates to be welded along the length of the gap. The welding torch remains stationary, and the rotating device is activated. The two titanium alloy plates to be welded rotate along a set route and amplitude under the drive of the rotating device. The rotating support component 12 can drive the support platform 11 to rotate horizontally. The rotating support component 12 can automatically extend and retract with the direction of rotation to increase the heating range. The movable base 13 can drive the support platform 11 to move along the length of the gap between the titanium alloy plates to be welded. The laser beam emitted by the laser and the hollow tungsten electrode 4 melt the welding wire. The deposited metal fills along the length of the gap. After the molten pool cools, a solid weld is formed, thus connecting the two titanium alloy plates to be welded. Welding parameters are as follows: laser power 6KW; TIG welding current 260A; shielding gas is introduced off-axis at the welding position or argon shielding gas, coaxial with the hollow tungsten electrode 4 and the laser beam, is introduced outside the hollow tungsten electrode 4, with a shielding gas flow rate of 16L / min. Filler welding parameters are as follows: wire feed speed 1.5m / min; wire diameter 1.2mm; laser power 5KW; TIG welding current 240A; shielding gas is introduced off-axis at the welding position or argon shielding gas, coaxial with the hollow tungsten electrode 4 and the laser beam, is introduced outside the hollow tungsten electrode 4, with a shielding gas flow rate of 16L / min. The workpiece is then reset to achieve multi-layer, multi-pass welding.

[0050] In some optional embodiments, when one of the titanium alloy plates to be welded has a certain tilt angle and the other titanium alloy plate to be welded has a vertical bevel, the gap between the two titanium alloy plates to be welded is adjusted to 10 mm, and the value of D is 2 mm. The path of the laser beam rotating relative to the two titanium alloy plates to be welded is asymmetrical about the center line of the gap between the two titanium alloy plates to be welded.

[0051] Specifically, such as Figure 3 and Figure 5 As shown, two 70mm thick titanium alloy plates to be welded are processed. One of the plates is machined with a 10° single-sided V-shaped bevel. The plate is then ground with a grinding wheel to remove the surface oxide film. The surface is cleaned with acetone and alcohol in sequence and then dried. The included angle between the center of the hollow tungsten electrode 4 and the center of the laser beam is 20°. A 10mm gap is left between the two titanium alloy plates to be welded. A 10° single-sided V-shaped bevel is machined on one of the plates. A ceramic pad is placed under the two plates and fixed to the support platform 11. The bottom centers of the two plates coincide with the center of the rotating device. The bevel shapes of the two plates are adjusted so that one plate has a certain tilt angle and the other plate has a vertical bevel. The rotating device is moved according to the preset rotation path, rotation amplitude, and movement speed and direction in the gap length direction. The rotation path is circular, the rotation amplitude is 6mm, and the movement speed in the gap length direction is 10mm / s. The horizontal distance D between the center of the laser beam and the center line of the gap between the two titanium alloy plates to be welded is adjusted to 2mm. The laser beam will rotate asymmetrically and move longitudinally relative to the gap between the workpieces. The welding torch remains stationary, and the rotating device is activated. The two titanium alloy plates to be welded rotate along a set path and amplitude under the drive of the rotating device. The two titanium alloy plates to be welded move along the gap length direction under the drive of the rotating device. The laser beam emitted by the laser emitter and the hollow tungsten electrode 4 molten welding wire fill the gap between the two titanium alloy plates to be welded. The rotating support component 12 can extend and retract along its own height direction. The rotating support component 12 can drive the support platform 11 to rotate to increase the heating range. The path of the laser beam rotation relative to the two titanium alloy plates to be welded is asymmetrical about the center line of the gap between the two titanium alloy plates to be welded. The moving base 13 can drive the support platform 11 to move along the length direction of the gap formed by the titanium alloy plates to be welded. The laser beam emitted by the laser emitter and the hollow tungsten electrode 4 molten welding wire fill the titanium alloy gap, and the deposited metal fills the gap along the length direction of the gap. After the molten pool cools, a solid weld is formed, thus realizing the connection of the two titanium alloy plates to be welded. The welding parameters are as follows: laser power 5KW; TIG welding current 240A; shielding gas is introduced off-axis at the welding position or argon shielding gas, coaxial with the hollow tungsten electrode 4 and the laser beam, is introduced outside the hollow tungsten electrode 4, with a shielding gas flow rate of 16L / min. Filler welding parameters are: wire feed speed 1m / min; wire diameter 1.2mm; laser power 5KW; TIG welding current 240A; shielding gas is introduced off-axis at the welding position or argon shielding gas, coaxial with the hollow tungsten electrode 4 and the laser beam, is introduced outside the hollow tungsten electrode 4, with a shielding gas flow rate of 16L / min. This resets the two titanium alloy plates to be welded, achieving multi-layer, multi-pass welding of the workpiece.

[0052] In this invention, the term "multiple" refers to at least two or more, unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An apparatus for welding titanium alloy plates, characterized in that, include: The welding torch includes a housing (1), a fluid guide (2), a tungsten electrode (3), a hollow tungsten electrode (4), and a laser emitter. The tungsten electrode (3) is disposed at the end of the fluid guide (2), and the tungsten electrode (3) is connected to the hollow tungsten electrode (4). A laser emitter, wherein the laser beam emitted by the laser emitter is coaxial with the hollow tungsten electrode (4) after being redirected; The rotating device includes a support platform (11), a rotating support component (12), and a movable base (13). The rotating support component (12) is connected to the support platform (11) and the movable base (13) respectively. The rotating support component (12) can extend and retract along its own height direction. The rotating support component (12) can drive the support platform (11) to rotate. The movable base (13) can drive the support platform to move along the length direction of the gap formed by the titanium alloy plate to be welded. The support platform (11) is used to support two titanium alloy plates to be welded. A ceramic pad is provided between the titanium alloy plates and the support platform (11). There is a gap between the two titanium alloy plates. The laser beam emitted by the laser emitter and the hollow tungsten electrode (4) melt the welding wire to fill the gap between the two titanium alloy plates to be welded. The rotating support component (12) includes a first support rod (121), a drive assembly, and a second support rod (122). The first support rod (121) is provided with a mounting base, the drive assembly is provided on the mounting base, one end of the second support rod (122) is connected to the mounting base, and the other end of the second support rod (122) is connected to the support platform (11). The drive assembly includes a motor, an output shaft, and a coupling. The motor is mounted on the mounting base. One end of the output shaft is connected to the motor, and the other end of the output shaft is connected to the coupling. One end of the second support rod (122) is connected to the coupling, and the other end of the second support rod (122) is connected to the support platform (11). The second support rod (122) includes a first sub-support rod (123) and a second sub-support rod (124). One end of the first sub-support rod (123) is connected to the coupling, and the other end of the first sub-support rod (123) is connected to the second sub-support rod (124). The other end of the second sub-support rod (124) is connected to the support platform (11). The first sub-support rod (123) is an automatic telescopic rod.

2. A method for welding titanium alloy plates, using the equipment for welding titanium alloy plates as described in claim 1, characterized in that, It includes at least the following steps: Remove the oxide layer from the surface of the titanium alloy plate; Machining the bevel shape of the welding positions for the two titanium alloy plates to be welded; Adjust the gap between the two titanium alloy plates to be welded according to the bevel shape of the two plates. Adjust the positions of the two titanium alloy plates to be welded so that the gap between the two titanium alloy plates is at the preset position; Adjust the position of the welding torch so that the horizontal distance between the center of the laser beam and the center line of the length extension direction of the gap between the titanium alloy plates to be welded is D, where D is a preset value. The rotating device is activated, causing the two titanium alloy plates to be welded to rotate. The path of the laser beam relative to the two titanium alloy plates to be welded is symmetrical or asymmetrical about the center line of the gap between the two titanium alloy plates.

3. The method for welding titanium alloy plates according to claim 2, characterized in that, The step of adjusting the shape of the gap between the two titanium alloy plates to be welded includes, A gap is formed between the sidewalls of the two titanium alloy plates to be welded; Adjust the bevel shapes of the two titanium alloy plates to be welded so that the bevel of one of the titanium alloy plates to be welded has a certain tilt angle and the bevel of the other titanium alloy plate to be welded is vertical, or make the bevels of both titanium alloy plates to be welded vertical.

4. The method for welding titanium alloy plates according to claim 3, characterized in that, The step of adjusting the positions of the two titanium alloy plates to be welded so that the gap between the two titanium alloy plates is at a preset position includes, The central axis of the gap between the two titanium alloy plates to be welded coincides with the center of the support platform.

5. The method for welding titanium alloy plates according to claim 4, characterized in that, When the bevels of the two titanium alloy plates to be welded are vertical, the gap between the two titanium alloy plates to be welded is adjusted to 12mm, and the value of D is 4mm; the path of the laser beam rotating relative to the two titanium alloy plates to be welded is symmetrical about the center line of the gap between the two titanium alloy plates to be welded.

6. The method for welding titanium alloy plates according to claim 3, characterized in that, When one of the titanium alloy plates to be welded has a certain tilt angle and the other titanium alloy plate to be welded has a vertical bevel, the gap between the two titanium alloy plates to be welded is adjusted to 10mm, and the value of D is 2mm. The path of the laser beam rotating relative to the two titanium alloy plates to be welded is asymmetrical about the center line of the gap between the two titanium alloy plates to be welded.

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