A method and device for controlling the back shaping of a laser penetration welded T-joint weld
By real-time monitoring and adjustment of the back protective gas pressure, the problem of ensuring the back forming quality of the weld in T-joint laser welding has been solved, realizing single-sided welding with double-sided forming without forced forming groove, reducing porosity defects and lowering costs.
Patent Information
- Application Number
- CN202410973889.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2044-07-19
AI Technical Summary
During laser welding of T-joints, it is difficult to guarantee the forming quality of the back side of the weld, which is prone to problems such as collapse, insufficient penetration and porosity.
By capturing real-time images of laser welding plumes, measuring the plume height, and adjusting the back shielding gas pressure based on the plume height, a corresponding relationship is established. Adjusting the shielding gas pressure balances the mechanical state within the molten pool, thereby achieving shape control of the back side of the weld.
This ensures the forming quality of the back side of the weld, avoids porosity defects, shortens the experimental cycle by 20%, and reduces costs by 15%.
Smart Images
Figure CN118650284B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of laser welding technology, and in particular to a method and apparatus for controlling the back-side forming of laser-through weld seams in T-joints. Background Technology
[0002] Titanium alloys possess excellent properties such as high specific strength, specific stiffness, good heat resistance, and corrosion resistance, making them widely used in the aerospace field. Aircraft fuselage connections primarily utilize T-joints, typically achieved through welding. Welding methods commonly employ TiG welding or laser penetration welding. However, in current TIG and laser penetration welding processes, the weld seam is prone to collapse or exhibits insufficient penetration and inadequate back weld leg width due to the combined effects of arc force, gravity, and plasma back pressure, leading to difficulties in ensuring back weld formation quality. Currently, forced forming backing plates are often installed on the back of the T-joint to constrain back weld formation. However, the addition of forced forming backing plates can obstruct gas escape channels in the molten pool, especially during titanium alloy welding, easily resulting in excessive weld porosity. Therefore, this application proposes a method and apparatus for controlling the back weld formation of laser penetration welds on T-joints. Summary of the Invention
[0003] The main objective of this application is to provide a method and apparatus for controlling the back-side formation of laser-penetrated weld seams in T-joints, aiming to solve the technical problem that the back-side formation quality of weld seams is difficult to guarantee during the welding process of existing T-joints.
[0004] To achieve the above objectives, this application proposes a method for controlling the back-side forming of laser penetration welds in T-joints, comprising the following steps:
[0005] Test welding was performed on titanium alloy T-joints of different thicknesses, and laser welding feather photos were taken in real time. The feather height h1 during the test welding stage was measured.
[0006] Based on the feather height h1, adjust the back shielding gas pressure p1 during the welding process to establish the correspondence between the back shielding gas pressure p1 and the feather height h1;
[0007] Based on the correspondence between the back protective gas pressure p1 and the feather height h1, obtain the back protective gas pressure p2 of the titanium alloy T-joint to be welded with the required welding thickness;
[0008] Based on the back protective gas pressure p2 and simultaneously setting the welding parameters, laser penetration welding is performed on the titanium alloy T-joint to be welded to obtain the T-joint welded part.
[0009] Optionally, the step of performing test welding on titanium alloy T-joints of different thicknesses, taking real-time laser welding feather photos, and measuring the feather height h1 during the test welding stage includes:
[0010] During the trial welding stage, titanium alloy T-joints of different thicknesses were selected, and welding parameters adapted to the corresponding thicknesses were set. Laser penetration welding was performed on the titanium alloy T-joints. During welding, a high-speed camera was used to take real-time photos of the laser welding feathers, and the average height of the feathers was measured and calculated through an image acquisition and processing system to obtain the feather height h1 during the trial welding stage.
[0011] Optionally, the step of adjusting the back shielding gas pressure p1 during welding based on the plume height h1, and establishing the correspondence between the back shielding gas pressure p1 and the plume height h1, includes:
[0012] Based on the feather height h1, the back shielding gas pressure p1 is adjusted during the welding process to ensure that the weld pool is in relative equilibrium under the combined action of gravity, surface tension, plasma recoil force, and shielding gas pressure. This establishes the correspondence between the back shielding gas pressure p1 and the feather height h1 under different thicknesses and welding process parameters.
[0013] Optionally, the step of adjusting the back shielding gas pressure p1 during welding includes:
[0014] A laser beam is applied to the titanium alloy T-joint, and a protective gas is introduced to protect the front side of the titanium alloy T-joint. At the same time, the protective gas flows through the back side of the weld of the titanium alloy T-joint, and the pressure p1 of the protective gas on the back side is adjusted.
[0015] Optionally, the step of obtaining the back shielding gas pressure p2 of the titanium alloy T-joint to be welded for the required welding thickness based on the correspondence between the back shielding gas pressure p1 and the plume height h1 includes:
[0016] The feather height h2 during the actual welding of the titanium alloy T-joint to be welded is obtained by simulating welding, and the proportionality coefficient α between the feather height h1 and the feather height h2 is determined.
[0017] Based on the proportionality coefficient α and the correspondence between the back shielding gas pressure p1 and the feather height h1, the back shielding gas pressure p2 of the titanium alloy T-joint to be welded with the required welding thickness is obtained.
[0018] Optionally, the step of obtaining the feather height h2 during the actual welding of the titanium alloy T-joint to be welded through simulated welding, and determining the proportionality coefficient α between the feather height h1 and the feather height h2, includes:
[0019] Suspended welding is performed using a plate of the same thickness as the titanium alloy T-joint to be welded. At the same time, a high-speed camera takes real-time photos of the feathers, and the average height of the feathers is measured and calculated by an image acquisition and processing system to obtain the actual feather height h2 during welding. The proportionality coefficient α between the feather height h1 and the feather height h2 is then determined.
[0020] This application also proposes a control device for back-side forming of laser penetration weld seam in T-joints, including a laser welding head, a high-speed camera, and a protective gas cylinder. The laser welding head is positioned above the titanium alloy T-joint, and the high-speed camera is positioned between the laser welding head and the titanium alloy T-joint to monitor the real-time dynamic behavior of the welding feathers. A protective gas tube is connected to the protective gas cylinder, and the protective gas tube is connected to both the front and back sides of the titanium alloy T-joint. A gas pressure regulating valve is provided on the protective gas tube.
[0021] Optionally, the back of the titanium alloy T-connector is provided with a back protective cover, and one end of the protective air tube connected to the back of the titanium alloy T-connector passes through the back protective cover.
[0022] Optionally, the end of the protective air tube that is connected to the front of the titanium alloy T-joint is provided with a side-blowing protective air nozzle.
[0023] Optionally, the high-speed camera is connected to an image acquisition and processing system.
[0024] The beneficial effects of this application include:
[0025] This application first measures the feather height during the trial welding stage by taking laser welding feather photographs. Based on the feather height during the trial welding stage, the back shielding gas pressure is adjusted during the welding process. This establishes the relationship between the back shielding gas pressure and the real-time feather height for achieving good weld formation under different thicknesses and welding process parameters. The feather height can indirectly reflect the magnitude of the plasma recoil force within the laser welding keyhole. The shielding gas pressure provides flexible support for the weld pool. By adjusting the back shielding gas pressure, the gravity, surface tension, and plasma recoil force of the weld pool can be balanced to ensure the back weld leg size. This ensures that the weld pool is in relative equilibrium under the combined action of gravity, surface tension, plasma recoil force, and shielding gas pressure, thereby guaranteeing the forming quality of the weld front and back. Before actual welding, the feather height of the titanium alloy T-joint to be welded with the required welding thickness is obtained under actual welding parameters. Based on this height and the correspondence between the back shielding gas pressure and the feather height, the back shielding gas pressure of the titanium alloy T-joint to be welded with the required welding thickness is adjusted during actual welding. Welding is then performed, thus achieving control over the forming of the weld back side. This application establishes the relationship between the height of the feather and the back shielding gas pressure by taking pictures. During actual welding, the back shielding gas pressure is adjusted to achieve back forming control. There is no need for a forced forming groove on the back of the weld. Under the condition that the back of the weld is suspended, single-sided welding and double-sided forming can be achieved, ensuring that the T-joint is not welded to collapse. Moreover, the gas in the molten pool can overflow from the back, avoiding the porosity problem caused by the back gas overflow obstruction, reducing porosity defects in the weld. Furthermore, by adjusting the shielding gas pressure by the height of the feather, the experimental cycle can be shortened by about 20% and the experimental cost can be reduced by about 15%. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0027] Figure 1 This is a schematic diagram of the structure of the T-joint laser penetration welding weld back side forming control device described in the embodiments of this application;
[0028] Figure 2 This is a side view of the T-joint laser penetration welding weld back-side forming control device described in the embodiments of this application;
[0029] Figure 3 This is a schematic diagram of the back fillet weld results of specimens 1 and 2 described in the embodiments of this application.
[0030] Figure label:
[0031] 1-Back protective cover; 2-Feather; 3-Laser beam; 4-Laser welding head; 5-High-speed camera; 6-Image acquisition and processing system; 7-Titanium alloy T-connector; 8-Side blow protective nozzle; 9-Protective gas cylinder; 10-Protective gas tube; 11-Gas pressure regulating valve.
[0032] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0034] To address the technical problems existing in the prior art, embodiments of this application provide a method for controlling the back-side forming of a laser penetration weld at a T-joint, comprising the following steps:
[0035] Test welding was performed on titanium alloy T-joints of different thicknesses, and laser welding feather photos were taken in real time. The feather height h1 during the test welding stage was measured.
[0036] Based on the feather height h1, adjust the back shielding gas pressure p1 during the welding process to establish the correspondence between the back shielding gas pressure p1 and the feather height h1;
[0037] Based on the correspondence between the back protective gas pressure p1 and the feather height h1, obtain the back protective gas pressure p2 of the titanium alloy T-joint to be welded with the required welding thickness;
[0038] Based on the back protective gas pressure p2 and simultaneously setting the welding parameters, laser penetration welding is performed on the titanium alloy T-joint to be welded to obtain the T-joint welded part.
[0039] This application first measures the feather height during the trial welding stage by taking laser welding feather photographs. Based on the feather height during the trial welding stage, the back shielding gas pressure is adjusted during the welding process. This establishes the relationship between the back shielding gas pressure and the real-time feather height when good weld formation is achieved. The feather height can indirectly reflect the magnitude of the plasma recoil force in the laser welding keyhole. The shielding gas pressure can provide flexible support for the weld pool. By adjusting the back shielding gas pressure, the gravity, surface tension, and plasma recoil force of the weld pool can be balanced to ensure the back weld leg size. This allows the weld pool to be in relative balance under the combined action of gravity, surface tension, plasma recoil force, and shielding gas pressure, thereby ensuring the forming quality of the weld front and back. Before actual welding, the back shielding gas pressure of the titanium alloy T-joint to be welded with the required welding thickness is obtained under the actual welding parameters, and then welding is performed, thus achieving the forming control of the back of the weld. This application establishes the relationship between the height of the feather and the back shielding gas pressure by taking pictures. During actual welding, the back shielding gas pressure is adjusted to achieve back forming control. There is no need for a forced forming groove on the back of the weld. Under the condition that the back of the weld is suspended, single-sided welding and double-sided forming can be achieved, ensuring that the T-joint is not welded to collapse. Moreover, the gas in the molten pool can overflow from the back, avoiding the porosity problem caused by the back gas overflow obstruction, reducing porosity defects in the weld. Furthermore, by adjusting the shielding gas pressure by the height of the feather, the experimental cycle can be shortened by about 20% and the experimental cost can be reduced by about 15%.
[0040] As one possible implementation of this application, the step of performing test welding on titanium alloy T-joints of different thicknesses, taking real-time laser welding feather photographs, and measuring the feather height h1 during the test welding stage includes:
[0041] During the trial welding stage, titanium alloy T-joints of different thicknesses were selected, and welding parameters adapted to the corresponding thicknesses were set. Laser penetration welding was performed on the titanium alloy T-joints. During welding, a high-speed camera was used to take real-time photos of the laser welding feathers, and the average height of the feathers was measured and calculated through an image acquisition and processing system to obtain the feather height h1 during the trial welding stage.
[0042] Specifically, feathering is an inherent physical phenomenon in laser welding with wavelengths on the order of 1μm. The dynamic behavior of feathering is closely related to welding defects. By monitoring the dynamic behavior of feathering in real time with a high-speed camera and measuring and calculating the average height of feathering through an image acquisition and processing system, a correspondence between the acquired signals and welding defects can be established.
[0043] As one possible implementation of this application, the step of adjusting the back shielding gas pressure p1 during welding based on the plume height h1, and establishing the correspondence between the back shielding gas pressure p1 and the plume height h1, includes:
[0044] Based on the feather height h1, the back shielding gas pressure p1 is adjusted during the welding process to ensure that the weld pool is in relative equilibrium under the combined action of gravity, surface tension, plasma recoil force, and shielding gas pressure. This establishes the correspondence between the back shielding gas pressure p1 and the feather height h1 under different thicknesses and welding process parameters.
[0045] Since the dynamic behavior of plume is closely related to welding defects, and the plume height can indirectly reflect the magnitude of plasma recoil force in the laser welding keyhole, this application establishes the relationship between the back shielding pressure and the plume height captured by a high-speed camera when obtaining good weld formation under different thicknesses and welding process parameters. Based on the plume height, the back shielding gas pressure is adjusted so that the molten pool can maintain relative balance under the combined action of gravity, surface tension and plasma recoil force.
[0046] As one possible implementation of this application, the step of adjusting the back shielding gas pressure p1 during welding includes:
[0047] A laser beam is applied to the titanium alloy T-joint, and a protective gas is introduced to protect the front side of the titanium alloy T-joint. At the same time, the protective gas flows through the back side of the weld of the titanium alloy T-joint, and the pressure p1 of the protective gas on the back side is adjusted.
[0048] As one possible implementation of this application, the step of obtaining the back shielding gas pressure p2 of the titanium alloy T-joint to be welded for the required welding thickness based on the correspondence between the back shielding gas pressure p1 and the plume height h1 includes:
[0049] The feather height h2 during the actual welding of the titanium alloy T-joint to be welded is obtained by simulating welding, and the proportionality coefficient α between the feather height h1 and the feather height h2 is determined.
[0050] Based on the proportionality coefficient α and the correspondence between the back shielding gas pressure p1 and the feather height h1, the back shielding gas pressure p2 of the titanium alloy T-joint to be welded with the required welding thickness is obtained.
[0051] In the specific implementation process, the step of obtaining the plume height h2 during the actual welding of the titanium alloy T-joint to be welded through simulated welding, and determining the proportionality coefficient α between the plume height h1 and the plume height h2, includes:
[0052] Suspended welding is performed using a plate of the same thickness as the titanium alloy T-joint to be welded. At the same time, a high-speed camera takes real-time photos of the feathers, and the average height of the feathers is measured and calculated by an image acquisition and processing system to obtain the actual feather height h2 during welding. The proportionality coefficient α between the feather height h1 and the feather height h2 is then determined.
[0053] To predict the feather height of the titanium alloy T-joint to be welded under corresponding thickness and actual welding parameters, this application selects plates of equal thickness for simulated welding before actual welding and uses a high-speed camera to take real-time feather photos. Due to the difference in the placement position of the high-speed camera each time, it is necessary to compare the feather height h2 during actual welding with the feather height h1 during the trial welding stage of the same plate thickness to obtain the ratio between the two, and then adjust the back shielding gas pressure during actual welding.
[0054] Embodiments of this application also provide a control device for back-side forming of laser-penetrated weld seams in T-joints, such as... Figure 1 and Figure 2 As shown, the device includes a laser welding head 4, a high-speed camera 5, and a protective gas cylinder 9. The laser welding head 4 is positioned above the titanium alloy T-joint 7. The high-speed camera 5 is positioned between the laser welding head 4 and the titanium alloy T-joint 7 to monitor the real-time dynamic behavior of the welding feathers 2. A protective gas tube 10 is connected to the protective gas cylinder 9. The protective gas tube 10 is connected to the front and back of the titanium alloy T-joint 7, respectively. A gas pressure regulating valve 11 is provided on the protective gas tube 10.
[0055] The forming control device of this application includes a laser welding head 4, a high-speed camera 5, and a protective gas cylinder 9. The laser welding head 4 is positioned above the titanium alloy T-joint 7. The laser beam 3 emitted by the laser welding head 4 directly acts on the titanium alloy T-joint 7. During laser welding, the laser beam passes through the feather 2. Therefore, the high-speed camera 5 is positioned between the laser welding head 4 and the titanium alloy T-joint 7 to monitor the real-time dynamic behavior of the welding feather 2. At the same time, one end of the protective gas pipe 10 is connected to the protective gas cylinder 9, and the other end is divided into two streams and connected to the front and back of the titanium alloy T-joint 7 respectively. The protective gas flows from the protective gas cylinder 9 through the protective gas pipe 10 to protect the front and back of the titanium alloy T-joint 7. The protective gas pipe 10 is also equipped with a gas pressure regulating valve 11. The pressure of the protective gas on the back can be adjusted by the gas pressure regulating valve 11, thereby realizing the forming control of the back and ensuring the size of the back weld foot.
[0056] As one possible implementation of this application, the back of the titanium alloy T-connector 7 is provided with a back protective cover 1, and one end of the protective air tube 10 connected to the back of the titanium alloy T-connector passes through the back protective cover 1.
[0057] This application provides a back cover 1 on the back of the titanium alloy T-joint 7, which allows protective gas to flow from the protective gas cylinder 9 through the protective gas pipe 10 and into the back cover 1, thereby protecting the back of the weld and ensuring the forming quality of the back of the weld.
[0058] As one possible implementation of this application, the end of the protective air tube 10 that is connected to the front of the titanium alloy T-type connector is provided with a side-blowing protective air nozzle 8.
[0059] Specifically, the side-blowing protective air nozzle 8 is located on the front of the titanium alloy T-joint. The side-blowing protective air nozzle 8 is connected to the protective air cylinder 9, so that the protective gas flows out from the protective air cylinder 9 and passes through the protective air pipe 10 before being blown out from the side-blowing protective air nozzle 8, thereby protecting the front of the titanium alloy T-joint and ensuring the forming quality of the front of the T-joint.
[0060] In one possible implementation of this application, the high-speed camera 5 is connected to an image acquisition and processing system 6. The image acquisition and processing system 6 can process the feather images captured in real time by the high-speed camera 5, analyze and measure the acquired signals, and thus calculate the height of the feathers.
[0061] The technical solutions described above in this application will be explained in detail below with reference to specific embodiments.
[0062] Example 1
[0063] A method for controlling the back-side formation of laser-through weld seam in T-joints includes the following steps:
[0064] During the trial welding stage, titanium alloy T-joints of different thicknesses were selected, and welding power and welding speed adapted to the corresponding thicknesses were set. Laser penetration welding was performed on the titanium alloy T-joints. The laser beam 3 emitted by the laser welding head 4 acted on the titanium alloy T-joint 7. The protective gas blown out by the side-blowing protective gas nozzle 8 protected the front of the titanium alloy T-joint. At the same time, the protective gas flowed from the protective gas cylinder 9 through the protective gas pipe 10 into the back protective cover 1 to protect the back of the weld. The back protective gas pressure p1 was adjusted by the gas pressure regulating valve 11 so that the weld pool was in relative equilibrium under the combined action of gravity, surface tension, plasma recoil force and protective gas pressure. During welding, a high-speed camera 5 was used to take real-time photos of the laser weld feathers. The average height of the feathers 2 was measured and calculated by the image acquisition and processing system 6 to obtain the feather height h1 during the trial welding stage. Based on the feather height h1, the correspondence between the back protective gas pressure p1 and the feather height h1 under different thicknesses and different welding process parameters was established.
[0065] Before actually welding the titanium alloy T-joint, a plate of the same thickness as the titanium alloy T-joint to be welded is used for suspended welding. At the same time, the high-speed camera 5 takes real-time photos of the feathers, and the average height of the feathers 2 is measured and calculated by the image acquisition and processing system 6 to obtain the actual feather height h2 during welding, and to determine the ratio coefficient α between the feather height h1 and the feather height h2.
[0066] Based on the proportionality coefficient α and the correspondence between the back shielding gas pressure p1 and the feather height h1, the back shielding gas pressure p2 of the titanium alloy T-joint to be welded with the required welding thickness is obtained.
[0067] Based on the back protective gas pressure p2, and simultaneously setting the welding power and welding speed for the corresponding thickness, laser penetration welding is performed on the titanium alloy T-joint to be welded to obtain the T-joint welded part.
[0068] Experimental Example
[0069] The effect of back shielding gas pressure on the back fillet weld of a T-joint was tested. The back shielding gas pressure was adjusted by changing the gas flow rate. Welding parameters were set, and laser penetration welding was performed. The resulting back fillet weld of the T-joint was observed. The welding parameters were set according to Table 1 below, and the test results are as follows. Figure 3 As shown.
[0070] Table 1
[0071]
[0072] Depend on Figure 3 As can be seen from the comparison of the back fillet welds of specimen 1 and specimen 2, the back fillet weld of specimen 2 is significantly smaller than that of specimen 1. This indicates that when the gas flow rate is large, the back fillet weld can be significantly smaller. The present application is effective in adjusting the back fillet weld height by adjusting the back shielding gas pressure, which can achieve back weld formation control.
[0073] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.
Claims
1. A method for controlling the back-side formation of a laser-through weld in a T-joint, comprising the following steps: During the trial welding stage, titanium alloy T-joints of different thicknesses were selected, and welding parameters adapted to the corresponding thicknesses were set. Laser penetration welding was performed on the titanium alloy T-joints. During welding, a high-speed camera was used to take real-time photos of the laser welding feathers, and the average height of the feathers was measured and calculated through an image acquisition and processing system to obtain the feather height h1 during the trial welding stage. Based on the feather height h1, the back shielding gas pressure p1 during the welding process is adjusted so that the weld pool is in relative equilibrium under the combined action of gravity, surface tension, plasma recoil force and shielding gas pressure. The correspondence between the back shielding gas pressure p1 and the feather height h1 under different thicknesses and different welding process parameters is established. Based on the correspondence between the back protective gas pressure p1 and the feather height h1, obtain the back protective gas pressure p2 of the titanium alloy T-joint to be welded with the required welding thickness; Based on the back shielding gas pressure p2 of the titanium alloy T-joint to be welded with the required welding thickness, and simultaneously setting the welding parameters, laser penetration welding is performed on the titanium alloy T-joint to be welded to obtain the T-joint welded part.
2. The method for controlling the back-side formation of laser-penetrated weld seam in T-joints according to claim 1, characterized in that, The step of adjusting the back shielding gas pressure p1 during the welding process includes: A laser beam is applied to the titanium alloy T-joint, and a protective gas is introduced to protect the front side of the titanium alloy T-joint. At the same time, the protective gas flows through the back side of the weld of the titanium alloy T-joint, and the pressure p1 of the protective gas on the back side is adjusted.
3. The method for controlling the back-side formation of laser-penetrated weld seam in T-joints according to claim 1, characterized in that, The step of obtaining the back shielding gas pressure p2 of the titanium alloy T-joint to be welded for the required welding thickness based on the correspondence between the back shielding gas pressure p1 and the plume height h1 includes: The feather height h2 during the actual welding of the titanium alloy T-joint to be welded is obtained by simulating welding, and the proportionality coefficient α between the feather height h1 and the feather height h2 is determined. Based on the proportionality coefficient α and the correspondence between the back shielding gas pressure p1 and the feather height h1, the back shielding gas pressure p2 of the titanium alloy T-joint to be welded with the required welding thickness is obtained.
4. The method for controlling the back-side formation of laser-penetrated weld seam in T-joints according to claim 3, characterized in that, The step of obtaining the feather height h2 during the actual welding of the titanium alloy T-joint to be welded through simulated welding, and determining the proportionality coefficient α between the feather height h1 and the feather height h2, includes: Suspended welding is performed using a plate of the same thickness as the titanium alloy T-joint to be welded. At the same time, a high-speed camera takes real-time photos of the feathers, and the average height of the feathers is measured and calculated by an image acquisition and processing system to obtain the actual feather height h2 during welding. The proportionality coefficient α between the feather height h1 and the feather height h2 is then determined.
Citation Information
Patent Citations
Pulse laser welding method and device assisted by electromagnetic force
CN105057887A