Titanium alloy material plate splicing process

Abstract

The invention relates to a titanium alloy material plate splicing process, which is suitable for splicing titanium alloy plates with different thicknesses and complex structures, and is suitable for manufacturing large titanium alloy structural parts in the fields of aerospace, ocean engineering and the like, and comprises the following steps: pretreating the surfaces of the titanium alloy plates, accurately setting welding current, voltage and welding speed, and welding the titanium alloy plates. And double-side preheating and postwelding slow cooling technologies are adopted, so that uniform cooling of welding seams is ensured, and stress concentration is reduced. According to the technological method, welding technological parameters are optimized, welding heat input and the cooling rate are reasonably controlled, the defects of air holes, cracks, coarse grains and the like in the welding process are effectively restrained, therefore, the welding seam quality and the mechanical property of a connector are improved, the complexity of welding equipment and the production cost are reduced, application and popularization are convenient, and the method is suitable for popularization and application. And the splicing requirements of large-size and complex-structure titanium alloy plates can be met, and the welding efficiency and the finished product quality are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a plate-joining process from a titanium alloy material. Background Art

[0002] Titanium alloys are widely used in aerospace, chemical, shipbuilding, biomedicine and other fields due to their excellent properties such as high strength, low density, good corrosion resistance and high temperature resistance. They are particularly suitable for applications with high requirements for structural strength and weight ratio. In the aerospace field, the proportion of titanium alloy structural materials used has increased year by year. For example, titanium alloys are often used to manufacture aircraft fuselage structures, engine components, wing beams, etc. to achieve lightweight structures and improve equipment performance. In the field of marine engineering, titanium alloys have outstanding corrosion resistance and are suitable for key structural components in saltwater environments. In the biomedical field, the biocompatibility of titanium alloys makes them suitable for the production of artificial joints, orthopedic implants, etc.

[0003] Although titanium alloys have excellent properties, they are difficult to process and weld, mainly because titanium alloys are very easy to react with gases such as oxygen, nitrogen, and hydrogen at high temperatures, resulting in defects such as brittle phases and pores in the welding area. Therefore, in order to obtain high-quality welded joints, the commonly used titanium alloy welding processes include argon arc welding (TIG), electron beam welding (EBW), laser welding (LBW), and plasma arc welding (PAW). These welding methods have their own advantages and disadvantages, and have different applicability under different thicknesses, structures, and environmental requirements:

[0004] TIG welding (TIG): This method has a stable arc and is easy to operate, suitable for welding thinner titanium alloy plates. However, it has low energy density and limited penetration ability, making it unsuitable for efficient welding of thicker plates.

[0005] Electron beam welding (EBW): Using a high-energy electron beam to melt titanium alloy joints in a vacuum environment can achieve extremely high penetration depth and weld quality. However, the high cost of equipment and the limitations of the vacuum environment make it difficult to popularize in on-site welding.

[0006] Laser welding (LBW): Laser welding has high energy density and fast welding speed, which is suitable for welding thin plates and precision parts, but it is more expensive and has strict requirements on equipment.

[0007] Plasma arc welding (PAW): Compared with argon arc welding, plasma arc welding has higher arc energy density and penetration, and is suitable for welding medium and thick plates. However, due to the complexity of the equipment and the difficulty of operation, its popularity is limited.

[0008] In the manufacture of titanium alloy structural parts, especially the splicing and welding of large-sized plates, there are significant technical challenges. The difficulties of titanium alloy splicing and welding mainly include:

[0009] Thermal cracks in welded joints: Titanium alloys are prone to coarse grains during high-temperature welding, and thermal cracks are caused by uneven stress during the cooling process, affecting the strength of the welded joints.

[0010] Oxidation and contamination at high temperatures: Titanium alloys are prone to react with oxygen, nitrogen and other gases in the air in high temperature environments to form brittle compounds, which reduces the toughness and plasticity of the weld area. Therefore, during welding, the welding area needs to be protected by inert gas to prevent oxidation.

[0011] Welding deformation and residual stress: Due to the low thermal conductivity and large expansion coefficient of titanium alloy, the heat is not easy to dissipate during welding, which can easily lead to overheating and deformation of the welding area. This phenomenon is particularly prominent when splicing thick plates, affecting welding accuracy and structural performance.

[0012] Although the existing welding methods can meet some titanium alloy welding requirements, they still have limitations when it comes to welding complex structural parts, special-shaped parts, and plates of different thicknesses. Specifically, they include:

[0013] Equipment complexity and high cost: Although electron beam welding and laser welding have high welding efficiency and high-quality welding effects, the equipment cost is expensive and it is difficult to promote them on a large scale in conventional industrial production.

[0014] Insufficient welding stability: Traditional argon arc welding and plasma arc welding in large-size titanium alloy splicing welding often lead to defects such as uneven weld joint quality, porosity, and deformation due to arc stability problems and excessive heat input.

[0015] Poor material adaptability: When dealing with welding plates of different thicknesses, the current welding method cannot meet the requirements of full penetration through one welding. Multiple welding and grinding are required, which increases the process complexity and time cost.

[0016] Difficulty in controlling protective gas: It is difficult to achieve complete oxygen-free protection when welding titanium alloys in an open environment. Although the traditional argon protection method provides protection for the joint area, gas infiltration may occur on both sides of the weld, resulting in increased weld brittleness. To this end, we designed a titanium alloy material splicing process to solve the above problems. Summary of the invention

[0017] The purpose of the present invention is to provide a titanium alloy material splicing process to address the deficiencies of the prior art and to solve the problems raised in the background technology.

[0018] To achieve the above object, the present invention provides the following technical solutions:

[0019] A titanium alloy material piecing process, the process method comprising the following steps:

[0020] ① Groove processing: Use mechanical or carbide grinding wheels to grind the grooves to ensure that the metal on the processed surface does not produce oxidation color; if grinding wheels are used, use carbide grinding wheels or files to remove the grinding wheel particles attached to the surface of the grooves to ensure the smoothness of the processed surface and the purity of the metal.

[0021] ② Debugging of the panel machine: Carry out a comprehensive inspection and debugging of the panel machine to ensure that all functions are in good condition and there is no metal dust, oil stains and rust stains in the welding area; the ducts, valves, pressure reducers, flow meters, hoses and welding torches of the protective gas system should be kept clean, and the residual air in the system should be ventilated before each welding.

[0022] ③ Cleaning before welding: including cleaning of base material and groove. Use acetone to remove grease, dirt and other contaminants from the base material surface. Use a stainless steel wire brush to clean at least 25 mm around the groove before welding. Use a clean white silk cloth dipped in acetone to wipe it to ensure that there is no rust, paint, metal powder and other debris. Complete welding within 4 hours after cleaning. If it exceeds the time limit, it needs to be cleaned again.

[0023] ④ Plate assembly and positioning welding: Assemble titanium alloy plates of different thicknesses as required and perform positioning welding. When the thickness of the weldment is 4mm, 5mm, and 6mm, the positioning welding length is 10 to 15mm, and the positioning weld spacing is 100 to 120mm; if the weld length is greater than 2000mm, the welding shall be increased by half of the original positioning weld spacing in the rear half of the weld.

[0024] ⑤ Panel welding: Select welding parameters according to process specifications to ensure adequate coverage of the protective gas to avoid defects such as oxidation, pores, and lack of fusion; during the welding process, construction personnel monitor the operation panel in real time and flexibly adjust welding parameters according to actual conditions to ensure weld quality and structural stability.

[0025] ⑥ Weld inspection and repair: After welding is completed, the appearance and internal quality of the weld are inspected to ensure that the weld is uniform, has a smooth transition, has no sharp corners or protrusions, and has no defects such as cracks and lack of fusion; the surface color of the weld can be used to judge the contamination situation to decide whether repair is needed.

[0026] As a preferred technical solution of the present invention, the groove processing step should ensure that there is no oxidation color on the processed surface during mechanical or carbide grinding processing. After grinding, a carbide grinding wheel or a file must be used to remove the grinding wheel particles attached to the groove surface to ensure the smoothness and metal purity of the processed surface and prevent pores or other defects during welding.

[0027] As a preferred technical solution of the present invention, the described panelizing machine debugging steps include the following contents:

[0028] a) Ensure that all functions of the panel machine are normal, especially the welding area must be kept free of metal dust, oil and rust;

[0029] b) The gas conduit, valve, pressure reducer, flow meter, hose, welding torch and other parts of the protective gas system should be clean and intact. Before each welding, the residual air in the system should be ventilated to ensure the gas protection effect during welding;

[0030] c) The key parts of the equipment need to be lubricated and performance tested to ensure the stability of the equipment during welding and reduce welding defects caused by equipment failure.

[0031] As a preferred technical solution of the present invention, the pre-welding cleaning step includes base material cleaning and groove cleaning, and the specific requirements are:

[0032] a) Cleaning of parent metal: Use acetone to clean the grease, dirt and other pollutants remaining on the surface of the parent metal before welding to prevent pollutants from entering the weld during welding;

[0033] b) Groove cleaning: Use a stainless steel wire brush to clean the surface at least 25 mm away from the edge of the groove, and wipe it with a clean white silk cloth dipped in acetone to ensure that there is no rust, paint, metal powder and other debris; complete welding within 4 hours after cleaning. If it exceeds the time limit, it needs to be cleaned again.

[0034] As a preferred technical solution of the present invention, in the panel assembly and positioning welding steps, when the thickness of the titanium alloy plate is 4 mm, 5 mm and 6 mm, manual tungsten inert gas arc welding should be used for positioning welding, and the length of the positioning weld is controlled between 10 and 15 mm, and the spacing between the positioning welds is 100 to 120 mm to ensure the strength and stability of the structure after splicing; when the weld length is greater than 2000 mm, the positioning welding is increased in the rear half of the weld, and the increased spacing is half of the original spacing.

[0035] As a preferred technical solution of the present invention, when the panels are assembled, the surface of the tack weld should be free of defects such as shrinkage holes, arc scratches, cracks, pores, etc. If the tack weld is unqualified, it must be completely removed, and tack welding must not be repeated at the same position to prevent metal fatigue at the weld and a decrease in structural strength.

[0036] As a preferred technical solution of the present invention, during the panel assembly process, the welding fixture and the groove must be kept clean, the assembly misalignment should not exceed 10% of the nominal thickness of the thinnest part of the joint, and must not exceed 2 mm; the assembly gap should comply with the drawings and process requirements to prevent deformation or uneven weld strength during welding.

[0037] As a preferred technical solution of the present invention, the panel welding step includes the following contents:

[0038] a) Select appropriate welding process parameters according to process assessment to ensure adequate coverage of the shielding gas during welding and avoid defects such as weld oxidation, pores and lack of fusion;

[0039] b) During the welding process, the operator needs to monitor the welding operation panel in real time and fine-tune the welding parameters according to the actual situation to ensure stable weld quality and reduce deformation in the heat-affected zone.

[0040] As a preferred technical solution of the present invention, the weld inspection and repair steps include checking the weld shape and size to ensure that the weld is uniform and has a smooth transition without sharp corners or protrusions, and defects such as cracks and lack of fusion are not allowed; the weld color can indicate the degree of weld contamination, and whether repair is needed can be determined based on the weld color.

[0041] As a preferred technical solution of the present invention, in the weld inspection step, the weld quality is judged according to the weld surface color and the color of the heat affected zone, specifically including:

[0042] a) The silvery white weld surface and the light yellow or golden heat-affected zone indicate that the weld quality is good and no repair is required;

[0043] b) Golden yellow or light blue surface is a qualified weld;

[0044] c) If the weld surface is light blue and the heat affected zone is also light blue, the weld surface needs to be cleaned with a stainless steel wire brush before welding the next weld;

[0045] d) If the weld is blue or purple, the weld and adjacent metal must be completely removed and the protection conditions must be improved before welding;

[0046] e) A gray or yellow powder surface indicates poor welding conditions. The weld and heat-affected zone need to be removed, and the gas supply problem of the protection system needs to be checked. A welding gas protection test should be performed before re-welding to ensure the protection effect.

[0047] As a preferred technical solution of the present invention, in the panel assembly step, arc-strike plates should be installed at both ends of the panel seam. The material of the arc-strike plates is the same as that of the base material, and the size is t×100×100 (t is the thickness of the thinner plate in the panel). The groove of the arc-strike plates is consistent with the groove of the base material to ensure the welding quality and the structural integrity of the panel seam ends.

[0048] As a preferred technical solution of the present invention, after the panel welding step is completed, the welded parts should be left to stand for at least 5 minutes to fully cool down to ensure the stability of the weld structure. Subsequent operations are allowed only after cooling to room temperature to reduce deformation or weld defects caused by post-weld stress.

[0049] As a preferred technical solution of the present invention, the weld inspection step includes non-destructive testing of the internal quality of the weld to detect hidden defects such as cracks, pores, and lack of fusion that may exist in the weld. The non-destructive testing method includes ultrasonic testing, X-ray testing or other testing methods suitable for titanium alloy materials.

[0050] As a preferred technical solution of the present invention, in the weld repair step, if welding defects are found, corresponding repairs need to be performed according to the defect type, such as removing weld defects and re-welding, while optimizing the shielding gas flow, welding speed and heat input to ensure that the quality of the repaired weld meets the design standards.

[0051] As a preferred technical solution of the present invention, during the entire panelization process, key process parameters are recorded and monitored, especially welding current, welding speed, wire feeding speed and shielding gas flow rate, to ensure the consistency of welding quality of each batch and meet the high-standard panelization requirements of titanium alloy materials.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] 1. The panelization process of the present invention can effectively control the heat input and cooling rate during the welding process, reduce defects such as pores, cracks and coarse grains that are easily generated in titanium alloys under high-temperature welding, thereby improving the mechanical properties and toughness of the welded joints and ensuring that the weld quality is more uniform and reliable.

[0054] 2. The splicing process of the present invention reduces the dependence on high-precision welding equipment through the innovation of welding technology, making the welding process simpler and reducing equipment costs, thereby improving the applicability of the technology in industry and effectively meeting the splicing welding needs of large quantities of titanium alloy structural parts.

[0055] 3. The panel splicing process of the present invention can adapt to the needs of splicing titanium alloy plates of different thicknesses and structural shapes, especially showing good stability in the splicing welding of large-size plates, ensuring the efficient welding of complex structures and special-shaped parts, and expanding the application range of titanium alloy materials. DETAILED DESCRIPTION

[0056] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0057] The specific implementation of the present invention is described in detail below in conjunction with multiple embodiments.

[0058] The present invention provides a titanium alloy material splicing process, which is suitable for splicing and welding titanium alloy plates of different thicknesses. The steps and parameter requirements of the process are described in detail below in combination with multiple embodiments, and detailed process parameters are provided in a table form to facilitate the selection of appropriate process standards in actual operation.

[0059] Example 1: Titanium alloy thin plate paneling process (plate thickness 4 mm)

[0060] Bevel processing

[0061] For 4mm thick titanium alloy sheets, use carbide grinding wheels to grind the grooves to ensure that no oxidation color appears on the processed surface. The grinding process should be carried out in a dust-free environment to prevent particles from adhering to the surface of the groove after grinding, avoiding defects during welding. If particles are attached to the surface after grinding with a grinding wheel, a carbide grinding wheel or file should be used for secondary cleaning.

[0062]

[0063]

[0064] Jigsaw machine debugging

[0065] Before welding, fully debug the panel machine to ensure that it functions properly. The welding area must be kept free of dust, oil and rust. Check the gas duct, valve, pressure reducer, flow meter and welding torch of the protective gas system to ensure that the equipment is not damaged. Ventilate and remove residual air in the system before welding to ensure the gas protection effect during welding.

[0066]

[0067] Cleaning before welding

[0068] Use acetone to clean the surface of the base material to remove grease and dirt. Then, use a stainless steel wire brush to clean the surface within 25mm of the groove edge to ensure that there is no rust, paint, dust or other debris on the groove. After cleaning, complete the welding within 4 hours. If it exceeds 4 hours, it needs to be cleaned again.

[0069]

[0070] Panel assembly and tack welding

[0071] During the assembly process, manual tungsten inert gas welding is used for positioning welding, the length of the positioning weld is controlled at 10-15mm, and the weld spacing is 100-120mm. If the weld length is greater than 2000mm, the positioning welding is increased by half of the original spacing in the rear half of the weld to ensure the strength and stability of the structure.

[0072]

[0073] Panel welding

[0074] During the welding process, select the appropriate current, welding speed and shielding gas flow according to the process specifications to avoid deformation of the plate due to high temperature. During the welding process, the construction personnel need to monitor the operation panel in real time and adjust the welding parameters appropriately according to the welding quality.

[0075]

[0076] Weld inspection and repair

[0077] After welding is completed, check the size and appearance of the weld to ensure that the weld has a smooth transition and no cracks or incomplete fusion. Judge the quality based on the color of the weld and make repairs if necessary.

[0078]

[0079]

[0080] Example 2: Titanium alloy thick plate paneling process (plate thickness 6mm)

[0081] In the thick plate assembly process, it is necessary to strengthen the non-destructive testing of welds to ensure that there are no defects such as cracks, lack of fusion and pores inside the welds.

[0082]

[0083] The above specific implementation methods provide a high-quality titanium alloy plate welding process flow through detailed specifications for groove processing, pre-weld cleaning, plate assembly, welding process parameters and weld detection. These embodiments are suitable for welding titanium alloy materials of different thicknesses and can be widely used in large titanium alloy structure plates in the fields of shipbuilding, aerospace, etc.

[0084] Example 3: Ultra-thin titanium alloy plate splicing process (plate thickness 2 mm)

[0085] Groove design and processing

[0086] For ultra-thin titanium alloy plates below 2 mm, groove processing is usually not performed. Direct splicing and welding are performed to avoid excessive material removal that may cause plate deformation or melt-through.

[0087] Plate thickness (mm) Bevel design Processing methods Surface quality requirements 2 No groove design Use grinding wheel for smoothing Smooth surface, no scratches

[0088] Welding process parameter setting

[0089] Use low current welding to avoid thermal deformation of ultra-thin plates, and use high-flow argon protection. Appropriately reduce the welding speed to reduce the heat-affected area.

[0090]

[0091] Weld inspection

[0092] Check the surface flatness and transition of the weld to ensure there are no ripples and weld bumps. It is suitable for structural parts with high requirements for surface flatness.

[0093] Example 4: Welding and splicing of medium-thick plates (plate thickness 8 mm)

[0094] Bevel processing

[0095] For titanium alloy plates with a thickness of 8 mm, a V-shaped groove design is adopted. The groove angle is controlled at 60°, which helps to improve the penetration of welding.

[0096] Plate thickness (mm) Bevel form Bevel angle (°) Processing tools 8 V-shaped groove 60 CNC milling or grinding machine

[0097] Preheating and welding preparation

[0098] It is recommended to preheat the medium and thick plates locally before welding (temperature controlled below 100°C) to reduce the thermal stress generated during welding. Acetone cleaning and stainless steel brush cleaning are also performed before welding.

[0099] Position welding

[0100] When positioning welding, appropriately increase the weld length and spacing to ensure the stability of positioning welding.

[0101]

[0102] Welding process parameters

[0103] When welding, increase the current appropriately to ensure penetration, and control the line energy to avoid deformation of the plate.

[0104] Plate thickness(mm) Welding methods Current (A) Welding speed (mm / min) Protective gas flow rate (L / min) 8 PAW 280-300 200-250 20-25

[0105] Example 5: Thick plate welding (plate thickness 10 mm and above)

[0106] Bevel processing

[0107] For titanium alloy plates thicker than 10 mm, an X-shaped groove is used to improve the welding penetration effect, and the groove angle is recommended to be 70°. Both sides of the weld need to be cleaned to ensure the welding quality.

[0108]

[0109] Position welding

[0110] Due to the strong rigidity of thick plates, the length of the positioning weld can be appropriately increased to 20-25mm, and the weld spacing can be adjusted to 150mm to ensure the stability of the structure and reduce the shrinkage deformation caused by the welding process.

[0111] Welding process parameters

[0112] Use high current and low welding speed to ensure penetration. Thick plate welding requires sufficient shielding gas to prevent oxidation during welding.

[0113] Plate thickness(mm) Welding methods Current (A) Welding speed (mm / min) Protective gas flow rate (L / min) 10+ PAW / TIG 300-350 150-200 25-30

[0114] Multi-layer and multi-pass welding

[0115] For plates with a thickness of more than 10 mm, multi-layer and multi-pass welding is used. The first layer of welding uses a lower current to ensure penetration, and the subsequent layers use medium and high currents to improve welding efficiency. After each welding pass, the slag should be cleaned and the weld surface quality should be checked.

[0116] Number of layers Current (A) Welding speed (mm / min) Cleaning method Ground floor 280 150 Stainless steel brush cleaning Middle Layer 300 180 Stainless steel brush cleaning surface layer 320 200 Finished grinding and polishing

[0117] Example 6: Titanium alloy dissimilar materials splicing (titanium alloy and stainless steel)

[0118] Bevel design

[0119] For the welding of dissimilar materials such as titanium alloy and stainless steel, the groove is designed as a composite V-shape to ensure the compatibility of the two materials. The groove angle is controlled between 50°-60° to facilitate uniform fusion of the materials during welding.

[0120] Plate combination Bevel form Bevel angle (°) Titanium alloy-stainless steel V-shaped groove 50-60

[0121] Welding materials

[0122] Use compatible welding materials (such as nickel-based welding materials) to improve the bonding strength between titanium alloy and stainless steel while avoiding the brittleness between the materials.

[0123] Welding material selection Applicable Materials characteristic Nickel-based welding materials Titanium alloy-stainless steel Strong bonding

[0124] Welding process parameters

[0125] When welding, use lower current, slow welding speed, and a mixed shielding gas of argon and nitrogen to reduce the metal diffusion effect in the heat affected zone.

[0126]

[0127]

[0128] Post-weld heat treatment

[0129] After welding of dissimilar materials, low-temperature heat treatment (200°C, 1 hour) is recommended to alleviate the impact of thermal stress and improve the durability of the joint.

[0130] Example 7: Titanium alloy complex structural parts (curved plate and flat plate)

[0131] Groove design and processing

[0132] For the splicing of curved and flat structures, the groove design should match the curvature. Adopt butt groove design and fix it with a clamp during installation to ensure that the joint is flat.

[0133] Welding process parameters

[0134] Use a lower welding speed and increase the shielding gas flow appropriately to avoid thermal deformation during welding.

[0135] Plate thickness(mm) Welding methods Current (A) Welding speed (mm / min) Protective gas flow rate (L / min) 6 TIG 200 120 25

[0136] Special fixture applications

[0137] For the combination of curved panels and flat panels, special clamps are used for fixing. The clamps should be installed to maintain close contact to avoid welding defects caused by gaps.

[0138] Post-weld inspection and correction

[0139] The full-size measurement of the structure after welding is carried out. If warping or deformation is found, slight correction can be made. Non-destructive testing (ultrasonic testing) is used for weld inspection to ensure that the weld quality meets the requirements.

[0140] The above embodiments provide detailed welding method guidance for different thicknesses of titanium alloys, welding of dissimilar materials and process requirements of complex structural parts. These solutions are suitable for the application of titanium alloys in aerospace, shipbuilding and other high-precision welding fields.

[0141] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A titanium alloy material paneling process, characterized in that: The process comprises the following steps: ① Groove processing: Use machinery or carbide grinding wheel to grind the groove; ② Debugging of the panel machine: Conduct a comprehensive inspection and debugging of the panel machine; ③ Cleaning before welding: including cleaning of base material and groove; ④ Plate assembly and positioning welding: Assemble titanium alloy plates of different thicknesses as required and perform positioning welding; ⑤ Panel welding: Select welding parameters according to process specifications; ⑥Weld ​​inspection and repair: After welding is completed, the weld appearance and internal quality inspection shall be carried out.

2. A titanium alloy material paneling process according to claim 1, characterized in that: The groove processing step should ensure that the processed surface is free of oxidation color when performing mechanical or carbide grinding processing. After grinding, a carbide grinding wheel or a file must be used to remove the grinding wheel particles attached to the groove surface.

3. A titanium alloy material paneling process according to claim 1, characterized in that: The described panelizing machine debugging steps include the following: a) Check whether the functions of the panel machine are normal, especially the welding area should be kept free of metal dust, oil and rust; b) The gas conduit, valve, pressure reducer, flow meter, hose and welding torch parts of the protective gas system should be clean and intact, and the residual air in the system should be ventilated before each welding; c) The key parts of the equipment need to be lubricated and performance tested.

4. A titanium alloy material paneling process according to claim 1, characterized in that: The pre-welding cleaning steps include base material cleaning and groove cleaning, and the specific requirements are: a) Cleaning of parent metal: Use acetone to clean the residual grease and dirt on the surface of the parent metal before welding to prevent pollutants from entering the weld during welding; b) Groove cleaning: Use a stainless steel wire brush to clean the surface at least 25 mm away from the edge of the groove, and wipe it with a clean white silk cloth dipped in acetone. Complete welding within 4 hours after cleaning. If it exceeds the time limit, it needs to be cleaned again.

5. The titanium alloy material paneling process according to claim 1, characterized in that: In the panel assembly and positioning welding steps, when the thickness of the titanium alloy plate is 4 mm, 5 mm and 6 mm, manual tungsten inert gas arc welding should be used for positioning welding, the positioning weld length is controlled between 10 and 15 mm, and the positioning weld spacing is 100 to 120 mm; when the weld length is greater than 2000 mm, the positioning welding is increased in the rear half of the weld, and the increased spacing is half of the original spacing; in the panel assembly step, arc-strike plates should be installed at both ends of the panel seam. The material of the arc-strike plates is the same as that of the base material, the size is t×100×100, and the groove of the arc-strike plates is consistent with the groove of the base material.

6. The titanium alloy material paneling process according to claim 1, characterized in that: When assembling the panels, the surface of the tack weld should be free of shrinkage holes, arc scratches, cracks, and porosity defects. If the tack weld is unqualified, it must be completely removed, and tack welding must not be repeated at the same position to prevent metal fatigue at the weld and a decrease in structural strength.

7. The titanium alloy material paneling process according to claim 1, characterized in that: During the panel assembly process, the welding fixtures and grooves must be kept clean, the assembly misalignment should not exceed 10% of the nominal thickness of the thinnest part of the joint, and must not exceed 2 mm; the assembly gap should comply with the drawings and process requirements to prevent deformation or uneven weld strength during welding.

8. The titanium alloy material paneling process according to claim 1, characterized in that: The panel welding steps include the following: a) Select appropriate welding process parameters according to process assessment, and ensure sufficient coverage of protective gas during welding to avoid weld oxidation, porosity and lack of fusion defects; b) During the welding process, the operator needs to monitor the welding operation panel in real time and fine-tune the welding parameters according to the actual situation.

9. The titanium alloy material paneling process according to claim 1, characterized in that: The weld inspection and repair steps include checking the weld shape and size to ensure that the weld is uniform, has a smooth transition, has no sharp corners or protrusions, and does not allow defects such as cracks and lack of fusion; the weld color can indicate the degree of weld contamination, and whether repair is needed is determined based on the weld color.

10. The titanium alloy material paneling process according to claim 1, characterized in that: In the weld inspection step, the weld quality is judged according to the weld surface color and the color of the heat affected zone, which specifically includes: a) The silvery white weld surface and the light yellow or golden heat-affected zone indicate that the weld quality is good and no repair is required; b) Golden yellow or light blue surface is a qualified weld; c) If the weld surface is light blue and the heat affected zone is also light blue, the weld surface needs to be cleaned with a stainless steel wire brush before welding the next weld; d) If the weld is blue or purple, the weld and adjacent metal must be completely removed and the protection conditions must be improved before welding; e) A gray or yellow powder surface indicates poor welding conditions. The weld and heat-affected zone need to be removed, the gas supply problem of the protection system needs to be checked, and a welding gas protection test needs to be performed before re-welding.

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