Welding device and welding method for titanium alloy plate

Abstract

The invention relates to the technical field of metal plate welding machining, in particular to a welding device and method for a titanium alloy plate. The plate heating device is used for carrying out heating pretreatment on cut titanium alloy plates, the combined welding device is connected with the plate heating device through a material moving and conveying device and receives the titanium alloy plates heated by the plate heating device for welding, and the closed atmosphere device is used for carrying out welding on the titanium alloy plates. The combined welding device is wrapped in a closed environment, gas components, air pressure and temperature adjustment in the closed welding environment are controlled, and the quality inspection device is connected with the closed atmosphere device through a material moving and conveying device and receives a titanium alloy plate welded and formed by the closed atmosphere device for welding seam quality inspection. All the devices are tightly connected through the material moving and conveying device, full-automatic production from heating, welding to quality detection is achieved, the welding requirements of high-requirement materials such as titanium alloy can be better met, and the safety and industrial applicability of equipment are improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal plate welding processing, and in particular to a welding device and a welding method for a titanium alloy plate. Background Art

[0002] The protective doors in civil air defense projects are mainly used to protect the entrances to underground spaces. In order to improve the ability to resist impact, titanium alloy materials are generally used. Titanium doors utilize the excellent properties of titanium alloys, can withstand high-intensity impacts, and are corrosion-resistant, and are suitable for extreme environments. Titanium alloy materials have low density and high strength-to-weight ratio, which can ensure protective performance while reducing weight. Titanium alloys have a long service life and are recyclable, which meets the sustainability requirements of modern engineering. Due to the high cost of titanium alloy materials and complex processing technology, titanium doors are only used in high-requirement fields such as civil defense and military defense, and the processing fault tolerance cost is relatively high.

[0003] Titanium alloy welding technology is one of the core processes for producing titanium doors for civil air defense projects, which directly affects the strength, protection capability and service life of the product. Titanium easily reacts with gases such as oxygen, nitrogen and hydrogen at high temperatures, resulting in embrittlement and decreased strength. The heat of titanium alloy welding is concentrated, and the weld is prone to overheating, resulting in welding stress and deformation. Especially when welding thinner titanium alloy plates, if the protection during the welding process is not proper, it is easy to cause weld porosity and thermal cracks, affecting the welding quality. Summary of the invention

[0004] In order to solve the fragility problem of titanium alloy plates during welding, improve the welding quality of titanium alloy door panels, improve production efficiency and reduce the defective rate, the present invention provides a titanium alloy plate welding device and a welding method.

[0005] On the one hand, the present invention provides a titanium alloy plate welding device adopts the following technical solution: A titanium alloy plate welding device, comprising: The plate heating device is used to pre-heat the cut titanium alloy plate; The combined welding device is connected to the plate heating device through the material transfer and conveying device, and receives the titanium alloy plate heated by the plate heating device for welding; Closed atmosphere device, which wraps the combined welding device in a closed environment and controls the gas composition, gas pressure and temperature regulation in the closed welding environment; The quality inspection device is connected to the closed atmosphere device through the material transfer and conveying device, and receives the titanium alloy plates formed by welding from the closed atmosphere device to perform weld quality inspection.

[0006] The plate heating device reduces the internal thermal stress of the titanium alloy plate by preheating, reduces the risk of weld cracks caused by thermal expansion and contraction during welding, and improves the plasticity of the titanium alloy material by heating, which facilitates subsequent welding operations and improves weld performance. The closed atmosphere device uses high-purity protective gas in a closed environment to effectively prevent the combined welding device from reacting with oxygen or nitrogen during titanium alloy welding, avoids weld embrittlement or surface oxidation, controls gas pressure and gas composition, optimizes metallurgical reactions during welding, and ensures weld strength and density. The quality inspection device can quickly detect defects such as pores, cracks, and unfused welds, thereby improving detection efficiency.

[0007] Furthermore, the plate heating device includes a heating box, a heating bracket and a material moving robot arm. The heating box is a closed box structure. The heating bracket is placed in the heating box and supports the titanium alloy plate being heated. The material moving robot arm is movably installed on one side of the heating box.

[0008] The closed box structure of the heating box can effectively reduce heat loss, concentrate heat in the heating area, and improve energy utilization efficiency. The closed structure can maintain a uniform heating environment in the box to avoid uneven performance of the titanium alloy plate due to local overheating or underheating. The heating bracket ensures that the titanium alloy plate remains stable during the heating process to avoid uneven heating or deformation caused by plate movement. The bracket design can reduce the direct contact between the titanium alloy plate and other components to prevent scratches or damage to the plate surface during heating. The design of the heating bracket facilitates the loading and removal of the plate, and cooperates with the material transfer robot to realize automated conveying operations. The robot realizes automated loading and unloading of the plate, reduces manual intervention, and improves production efficiency and process stability.

[0009] Furthermore, an electric heating wire is installed on the inner wall of the heating box body, and the electric heating wire is externally connected to a power supply. The outer wall of the heating box body is wrapped with an insulation shell, and the insulation shell is made of a fireproof and high-temperature resistant material and is evenly coated on the outer wall of the heating box body. An insulation door is installed on one side of the heating box body, and one side of the insulation door is hinged on the side wall of the heating box body, and the other side is locked and opened by a lock. The outer surface of the insulation door is evenly coated with a fireproof and high-temperature resistant material and is combined and connected with the insulation shell wrapped on the outer wall of the heating box body. An observation port is opened on the insulation door, and the observation port is installed by glass The heating box is closed, a temperature sensor is installed and connected to the heating box, the electric heating wire and the temperature sensor are externally connected to the temperature controller, the heating bracket is rotatably mounted with supporting rollers and conveying rollers, the supporting rollers and conveying rollers are arranged at intervals and the tops are flush with each other, the conveying rollers are connected to the conveying motor through a transmission structure, a material moving roller frame is installed at the front end of the material moving robot arm, the bottom of the material moving robot arm is vertically rotatably installed on a rotating seat, a moving wheel is rotatably installed on the bottom surface of the rotating seat, and the moving wheel is rotatably installed on a moving track and drives the rotating seat and the material moving robot arm to move along the moving track.

[0010] The electric heating wires are distributed on the inner wall of the heating box to ensure uniform heat transfer, avoid local over-high or over-low temperatures, and ensure heating quality. The power supply of the electric heating wires is accurately controlled by an external thermostat to make the heating process more stable and accurate. The insulation shell effectively isolates heat and reduces heat diffusion to ensure that heat energy is concentrated inside the box to improve heating efficiency. The fireproof and high-temperature resistant material improves the safety performance of the equipment and prevents unexpected risks caused by excessive outer wall temperature. The insulation door adopts a hinged structure and lock design to facilitate the opening and closing of the box and the loading and removal of the plates. The observation port is closed and glass is installed to facilitate workers to monitor the heating conditions inside the heating box to ensure the plates The material heating process is visualized and controllable. The temperature sensor monitors the temperature inside the box in real time and makes feedback adjustments through the thermostat to keep the temperature inside the heating box stable. The support roller provides stable support force to ensure that the plate will not move or deform during the heating process. The conveyor roller is connected to the conveyor motor, and the automatic conveying of the plate is realized through the transmission structure, which reduces manual operation and improves production efficiency. The tops of the support rollers and conveyor rollers are flush and evenly arranged, which reduces the risk of scratches and deformation on the surface of the plate and ensures product quality. The material transfer robot rolls on the moving track through the bottom swivel seat and moving wheels, and flexibly realizes the precise conveying and movement of the plate at different positions.

[0011] Furthermore, the combined welding device includes a welding gun, a welding gun bracket and a fixed mold. The welding gun is movably mounted on the welding gun bracket and performs routing welding on the titanium alloy plate under the control of the welding gun bracket. The fixed mold is installed on the welding side of the welding gun and carries and fixes the titanium alloy plate to be welded.

[0012] The welding gun is installed on the welding gun bracket. The welding gun can be moved accurately through the control of the bracket, making the welding process highly automated and reducing manual intervention. The control system of the welding gun bracket can realize the routing welding of the titanium alloy plate by the welding gun according to the preset trajectory, ensuring the accuracy of the welding path and improving the welding quality. The fixed mold is installed in the welding device, which can effectively carry and fix the welded titanium alloy plate to prevent the movement or vibration of the plate during welding and ensure welding accuracy. The reasonable combination of the welding gun and the fixed mold reduces welding defects caused by positioning deviation or plate deformation during welding, thereby reducing the rework rate.

[0013] Furthermore, the welding gun includes a laser emitter and a welding material conveyor, the laser emitting front end of the laser emitter and the welding material conveying front end of the welding material conveyor are cross-docked, the laser emitter is externally connected to a power supply and a start-stop controller, the welding material conveyor is externally connected to a welding material installation storage device and draws out the welding material on the welding material installation storage device and conveys it to the titanium alloy plate welding position, the welding gun bracket includes a mobile frame and a swing frame, the welding gun is installed on the swing frame and follows the swing frame to swing and move, the swing frame is movably installed on the mobile frame, the mobile frame controls and drives the swing frame and the welding gun to move, the fixed mold is designed and customized according to the titanium alloy plate welding structure, the fixed mold is installed and fixed on the mold bracket, the side and edge of the fixed mold are installed with mold clamps, and the mold clamps clamp the titanium alloy plates spliced ​​on the fixed mold.

[0014] The laser transmitter realizes high-power laser emission through an external power supply, provides an efficient energy source, and quickly completes the welding of titanium alloy plates. The heat-affected zone of laser welding is small, which reduces the problem of thermal deformation of the plate and is suitable for precision processing and high-requirement welding workpieces. The welding material conveyor is connected to the welding material installation storage device, which can automatically lead out the welding material and convey it to the welding position to achieve continuous supply of welding materials. The conveying front end of the welding material conveyor cross-docking with the laser emission front end ensures that the welding material is accurately melted and filled into the welding position under the action of the laser, ensuring the strength and consistency of the weld. The welding gun swings through the swing frame, and can achieve multi-angle and multi-directional precise welding according to the requirements of the welding path, and adapt to complex welding trajectories. The fixed mold is customized according to the specific welding structure of the titanium alloy plate, and fits the shape of the plate perfectly, ensuring that the plate is fixed firmly during the welding process, avoiding welding deviations caused by movement or deformation. The mold fixture is installed on the side and edge of the mold, and the titanium alloy plate spliced ​​on the fixed mold is firmly fixed by the clamping force to ensure that the plate does not slide or shift during welding.

[0015] Furthermore, the closed atmosphere device includes a closed box, an atmosphere circulation port and an insulating electric heater. The atmosphere circulation port is divided into an air inlet and an air outlet and are respectively opened on the corresponding two sides of the closed box. The closed box is connected to an external protective gas supply device through the atmosphere circulation port. The insulating electric heater is installed in the closed box and is externally connected to a power supply and a temperature controller.

[0016] The closed box isolates the welding area from the external environment to prevent oxygen and impurities in the outside air from interfering with the welding process, thereby protecting the material properties and welding quality of the welding area. The closed box is suitable for use in high-demand welding environments, especially for titanium alloy welding that requires an oxygen-free or low-oxygen atmosphere to ensure welding results. The air inlet and outlet are respectively arranged on both sides of the closed box to form an effective atmosphere circulation path to ensure that the protective gas is evenly distributed in the welding area. It is connected to the external gas supply device through the atmosphere circulation port to continuously and stably provide high-purity protective gas, such as argon or nitrogen, to the welding area to form an ideal welding protective atmosphere. The insulation electric heater is installed in the closed box to heat the inside of the box to ensure that the welding area is maintained within an appropriate temperature range and reduce titanium alloy plate welding defects caused by rapid welding cooling.

[0017] Furthermore, a sealing door is installed on one side of the closed box to control the opening and closing, and a sealing gasket is attached to the contact surface between the inner side of the sealing door and the closed box, and the sealing gasket tightly fills the gap between the sealing door and the closed box. Observation windows are provided on the closed box and the sealed door, and the observation windows are closed by glass installation. The atmosphere circulation ports on the corresponding sides of the closed box are respectively connected to the air inlet pipe and the air outlet pipe, and the air inlet pipe is connected to the compressed protective air box through an air pump. The air pump controls the protective gas to be poured from the compressed protective air box into the closed box along the air inlet pipe, and the air outlet pipe controls the outflow of gas in the closed box through the switch valve. A circulating fan is installed on the side of the heat-insulating electric heater facing the mold bracket, and the circulating fan is driven by the fan to blow air toward the titanium alloy plate on the mold bracket.

[0018] A sealing gasket is affixed to the inner contact surface of the sealed door to tightly fill the gap between the door body and the closed box body to prevent leakage of protective gas during welding and improve the airtightness of the box body. The observation windows on the closed box body and the sealed door are sealed with glass, which allows the operator to observe the status of the welding area in real time to ensure the safety and process accuracy of the welding process. The air pump compresses the high-purity gas in the protective gas box into the closed box body through the air inlet pipe to provide a stable and uniform protective atmosphere. The circulating fan installed on one side of the insulation electric heater can be driven by the fan to blow hot air toward the titanium alloy plate on the mold bracket, and the heat generated by the electric heater is evenly distributed in the welding area, which can eliminate the local temperature difference in the welding area, further reduce the thermal stress of the welding material, and avoid cracks or deformation in the weld area.

[0019] Furthermore, the quality inspection device includes an indicator spraying port, an air blast port and an observation monitoring head, the indicator spraying port sprays an indicator toward the welded titanium alloy plate, the inside of the welded titanium alloy plate is connected to an external air blast device through the air blast port and blows air into the inside of the welded titanium alloy plate, the observation monitoring head is movably installed and controlled to move along the weld of the welded titanium alloy plate, and the observation monitoring head photographs the weld toward the titanium alloy plate.

[0020] The indicator spray port can evenly spray the indicator onto the surface of the welded titanium alloy plate. Through the bubbles or color reaction of the indicator, it is possible to visually detect whether there are cracks, pores or other welding defects in the weld area. The high sensitivity of the indicator enables it to detect tiny defects that are difficult to detect with the naked eye, significantly improving the accuracy of weld quality inspection. The air blast port is connected to an external air blast device, and by blowing air into the titanium alloy plate, the sealing performance of the weld can be effectively detected. The observation monitoring head can be controlled and moved along the weld of the welded titanium alloy plate, and high-definition images or videos of the weld surface can be taken in real time, making it convenient for inspectors to conduct accurate weld quality assessment.

[0021] Furthermore, the indicator spray port is connected to the indicator material box through a pipeline, and a spray valve is installed on the pipeline connecting the indicator spray port and the indicator material box, and the spray valve controls the spraying and spraying speed of the indicator spray port, and the air blower is externally connected to the blower, and the blower is used to blow air into the titanium alloy plate and increase the internal air pressure, and a closed joint is provided at the pipeline connection where the air blower and the blower are connected, and the observation monitoring head is installed on the monitoring mobile frame and is driven to move by the monitoring mobile frame, and the front end of the observation monitoring head is converted and installed with a magnifying lens and a developing lens.

[0022] The pipe between the indicator spray port and the material box is equipped with a spray valve. The spray valve can control the spray speed and spray amount of the indicator according to the detection requirements to ensure uniform and efficient spraying. A magnifying lens and a developing lens are installed at the front end of the monitoring head. The magnifying lens can magnify the weld at a high power, which is convenient for accurate observation of the tiny details on the weld surface. The developing lens can cooperate with the reaction after the indicator spraying to clearly present the cracks, pores or other defects of the weld, further improving the accuracy of weld detection.

[0023] On the other hand, the present invention provides a titanium alloy plate welding method using the following technical solution: A titanium alloy plate welding method comprises the following welding processing steps: S1, heating the titanium alloy plate waiting for welding after cutting, and uniformly heating the titanium alloy plate by a plate heating device; S2, quickly moving the heated titanium alloy plate to the combined welding device for welding, wherein the welding steps mainly include: S2.1. Place the heated titanium alloy plate into a closed box in a closed atmosphere device, and then seal the titanium alloy plate in the closed box; S2.2. Use the atmosphere circulation port to inject protective gas into the closed box; S2.3, start the combined welding device to weld the titanium alloy plate, open the closed box after welding, and take out the welded titanium alloy plate; S3. The welded titanium alloy plates are placed in a quality inspection device to inspect the quality of the welds, and the titanium alloy plates with unqualified welds are recycled and re-welded.

[0024] Uniform heating of the titanium alloy plate by a plate heating device can effectively reduce thermal stress problems caused by local temperature differences. Heating of the titanium alloy before welding helps to improve the ductility and weldability of the material and reduce the probability of defects such as cracks or pores during welding. Uniform heating avoids cold welding or uneven performance of the heat-affected zone, thereby making the welded joint have more uniform microstructure and mechanical properties. Sealing the titanium alloy plate in a closed box and injecting protective gas into the box can effectively isolate oxygen, nitrogen and water vapor in the air, avoiding weld quality problems caused by oxidation, nitridation or hydrogen embrittlement during welding. Titanium alloy is extremely sensitive to impurity gases, and the closed atmosphere device can provide a pure welding environment, greatly improving the quality of welded joints.

[0025] In summary, the present invention has the following beneficial technical effects: 1. The plate heating device reduces the internal thermal stress of the titanium alloy plate by preheating, reduces the risk of weld cracks caused by thermal expansion and contraction during welding, and improves the plasticity of the titanium alloy material by heating, which is convenient for subsequent welding operations and improves the weld performance. The closed atmosphere device uses high-purity protective gas in a closed environment to effectively prevent the combined welding device from reacting with oxygen or nitrogen during titanium alloy welding, avoid weld embrittlement or surface oxidation, control gas pressure and gas composition, optimize metallurgical reactions during welding, and ensure weld strength and density. The quality inspection device can quickly detect defects such as pores, cracks, and lack of fusion in the weld, thereby improving detection efficiency.

[0026] 2. The closed box structure of the heating box can effectively reduce heat loss, concentrate heat energy in the heating area, and improve energy utilization efficiency. The closed structure can maintain a uniform heating environment in the box to avoid uneven performance of the titanium alloy plate due to local overheating or underheating. The heating bracket ensures that the titanium alloy plate remains stable during the heating process to avoid uneven heating or deformation caused by plate movement. The bracket design can reduce the direct contact between the titanium alloy plate and other components to prevent scratches or damage to the plate surface during heating. The design of the heating bracket facilitates the loading and removal of the plate, and cooperates with the material transfer robot to realize automated conveying operations. The robot realizes automated loading and unloading of the plate, reduces manual intervention, and improves production efficiency and process stability.

[0027] 3. The welding gun is installed on the welding gun bracket. The bracket controls the welding gun to achieve precise movement, making the welding process highly automated and reducing manual intervention. The control system of the welding gun bracket can enable the welding gun to perform routing welding on the titanium alloy plate according to the preset trajectory, ensuring the accuracy of the welding path and improving the welding quality. The fixed mold is installed in the welding device, which can effectively carry and fix the welded titanium alloy plate to prevent the movement or vibration of the plate during welding and ensure welding accuracy. The reasonable combination of the welding gun and the fixed mold reduces welding defects caused by positioning deviation or plate deformation during welding, thereby reducing the rework rate.

[0028] 4. The closed box isolates the welding area from the external environment to prevent oxygen and impurities in the outside air from interfering with the welding process, thereby protecting the material properties and welding quality of the welding area. The closed box is suitable for use in high-demand welding environments, especially for titanium alloy welding that requires an oxygen-free or low-oxygen atmosphere to ensure the welding effect. The air inlet and outlet are arranged on both sides of the closed box to form an effective atmosphere circulation path to ensure that the protective gas is evenly distributed in the welding area. It is connected to the external gas supply device through the atmosphere circulation port to continuously and stably provide high-purity protective gas, such as argon or nitrogen, to the welding area to form an ideal welding protective atmosphere. The insulation electric heater is installed in the closed box to heat the inside of the box to ensure that the welding area is maintained within a suitable temperature range and reduce titanium alloy plate welding defects caused by rapid welding cooling.

[0029] 5. The indicator spray port can evenly spray the indicator onto the surface of the welded titanium alloy plate. Through the bubble or color reaction of the indicator, it can be intuitively detected whether there are cracks, pores or other welding defects in the weld area. The high sensitivity of the indicator enables it to detect tiny defects that are difficult to detect with the naked eye, significantly improving the accuracy of weld quality inspection. The blast port is connected to an external blast device. By blowing air into the titanium alloy plate, the sealing performance of the weld can be effectively detected. The observation monitoring head can be controlled and moved along the weld of the welded titanium alloy plate, and high-definition images or videos of the weld surface can be taken in real time, which is convenient for inspectors to conduct accurate weld quality assessment.

[0030] 6. Uniform heating of the titanium alloy plate by the plate heating device can effectively reduce the thermal stress problem caused by local temperature differences. Heating the titanium alloy before welding helps to improve the ductility and weldability of the material and reduce the probability of defects such as cracks or pores during welding. Uniform heating avoids the problem of cold welding or uneven performance of the heat-affected zone, so that the welded joint has a more uniform microstructure and mechanical properties. Sealing the titanium alloy plate in a closed box and injecting protective gas into the box can effectively isolate oxygen, nitrogen and water vapor in the air, avoiding weld quality problems caused by oxidation, nitridation or hydrogen embrittlement during welding. Titanium alloy is extremely sensitive to impurity gases, and the closed atmosphere device can provide a pure welding environment and greatly improve the quality of welded joints. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The invention provides a layout structure for the welding processing line; Figure 2 for Figure 1 A local enlarged schematic diagram of point A; Figure 3 for Figure 1 A local enlarged schematic diagram of point B; Figure 4 It is a partial schematic diagram of the plate heating device of the present invention; Figure 5 for Figure 1 A schematic diagram of the structure from another perspective; Figure 6 for Figure 5 A partial enlarged schematic diagram of point C.

[0032] Description of reference numerals: 1. Plate heating device, 11. Heating box, 111. Electric heating wire, 112. Insulation shell, 113. Insulation door, 114. Observation port, 115. Temperature sensor, 12. Heating bracket, 121. Support roller, 122. Conveying roller, 123. Conveying motor, 13. Material transfer mechanical arm, 131. Material transfer roller frame, 132. Rotating seat, 133. Moving wheel, 134. Moving track; 2. Combined welding device, 21. Welding gun, 211. Laser transmitter, 212. Welding material conveyor, 22. Welding gun bracket, 221. Moving bracket, 222. Swinging bracket, 23. Fixed mold, 231. Mold bracket, 232. Mold fixture; 3. Closed atmosphere device, 31. Closed box, 311. Sealed door, 312. Sealed gasket, 313. Observation window, 32. Atmosphere circulation port, 321. Air inlet pipe, 322. Air outlet pipe, 323. Air pump, 324. Compression protection air box, 33. Insulation electric heater, 331. Circulation fan, 332. Fan; 4. Quality inspection device, 41. Indicator spray port, 411. Spray valve, 412. Indicator material box, 42. Air blast port, 421. Blower, 422. Closed joint, 43. Observation monitoring head, 431. Monitoring mobile frame, 432. Magnifying lens, 433. Developing lens. DETAILED DESCRIPTION

[0033] The following will be combined with the attached Figure 1-Figure 6 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] Embodiment 1: The embodiment of the present invention discloses a welding device for titanium alloy plates, referring to Figure 1 ,include: The plate heating device 1 is used to pre-heat the cut titanium alloy plate; The combined welding device 2 is connected to the plate heating device 1 through the material transfer and conveying device, and receives the titanium alloy plate heated by the plate heating device 1 for welding; A closed atmosphere device 3 encloses the combined welding device 2 in a closed environment and controls the gas composition, gas pressure and temperature in the closed welding environment; The quality inspection device 4 is connected to the closed atmosphere device 3 via a material transfer and conveying device, and receives the titanium alloy plates formed by welding from the closed atmosphere device 3 to perform weld quality inspection.

[0036] Confirm that the plate heating device 1 is in normal working condition, including the power connection, heating elements and temperature control system function normally, clean the heating area and ensure that there is no debris affecting the heating effect.

[0037] Place the titanium alloy plate flatly on the heating table of the plate heating device 1 to ensure that the plate is in full contact with the heating element, and adjust the supporting device according to the size and thickness of the plate to ensure that the plate is heated evenly.

[0038] According to the material properties of titanium alloy, set the appropriate heating temperature, and monitor the heating temperature in real time through the temperature control system to ensure temperature stability during the heating process.

[0039] Start the plate heating device 1, ensure that the heat source can evenly cover the entire plate surface, eliminate local temperature differences, and use a built-in circulation fan or heat conduction device to make the heat distribution more uniform.

[0040] Verify that the welding power source, welding head or torch, cooling system, and motion control system are in normal working condition.

[0041] The heated titanium alloy plate is placed on the workpiece fixing table of the combined welding device 2, and the workpiece is fixed by a positioning fixture or a suction cup system to prevent movement or deformation during welding.

[0042] Push the plate together with the workpiece fixing table into the closed box 31 of the closed atmosphere device 3, and close the sealing door 311 of the closed box 31, and inject protective gas, such as argon or helium, into the closed box 31 through the atmosphere circulation port 32 to maintain a pure atmosphere in the closed box 31 to prevent oxidation or contamination during welding.

[0043] The combined welding device 2 is started, and welding is completed according to the path and process parameters set by the program. The welding process is monitored in real time through the observation window 313 or the monitoring camera to ensure the quality of the weld.

[0044] The welded titanium alloy plate is placed on the inspection platform of the quality inspection device 4 and the workpiece is fixed with a clamp.

[0045] The indicator spray port 41 is started to spray the indicator evenly onto the weld surface.

[0046] The blower 421 is started, and air pressure is applied to the inside of the plate through the air blast port 42 to detect whether there is a leak in the weld. If there is a leak, the weld defect is determined by the location of the gas leak.

[0047] When the indicator is soapy water, welding defects can be judged by observing bubbles.

[0048] When the indicator is a chemical color developer, the color development of the chemical color developer is observed by passing a gas that reacts with the chemical color developer to develop color.

[0049] Embodiment 2: On the basis of Example 1, add: Reference Figure 1 and Figure 2 The plate heating device 1 includes a heating box 11, a heating bracket 12 and a material moving robot arm 13. The heating box 11 is a closed box structure. The heating bracket 12 is placed in the heating box 11 and supports the titanium alloy plate being heated. The material moving robot arm 13 is movably installed on one side of the heating box 11.

[0050] The heating temperature is 300-400°C, and the titanium alloy plate is heated to 100-120°C.

[0051] Reference Figure 1 and Figure 2 , an electric heating wire 111 is installed on the inner wall of the heating box 11, and the electric heating wire 111 is externally connected to a power supply. An insulation shell 112 is wrapped on the outer wall of the heating box 11, and the insulation shell 112 is made of a fireproof and high-temperature resistant material and is evenly coated on the outer wall of the heating box 11. A heat-insulating door 113 is installed on one side of the heating box 11, and one side of the heat-insulating door 113 is hinged on the side wall of the heating box 11, and the other side is locked and opened by a lock. The outer surface of the heat-insulating door 113 is evenly coated with a fireproof and high-temperature resistant material and is combined and connected with the heat-insulating shell 112 wrapped on the outer wall of the heating box 11, and an observation port 114 is opened on the heat-insulating door 113, and the observation port 114 is closed by glass installation. A temperature sensor 115 is installed and connected in the heating box 11, and the electric heating wire 111 and the temperature sensor 115 are externally connected to a thermostat; The heating bracket 12 is rotatably mounted with a support roller 121 and a conveying roller 122, the support roller 121 and the conveying roller 122 are arranged in an alternate manner and the tops thereof are flush with each other, and the conveying roller 122 is connected to a conveying motor 123 via a transmission structure; A material transfer roller frame 131 is installed at the front end of the material transfer robot arm 13, and the bottom of the material transfer robot arm 13 is vertically rotatably installed on a rotating seat 132. A moving wheel 133 is rotatably installed on the bottom surface of the rotating seat 132. The moving wheel 133 is rollingly installed on a moving track 134 and drives the rotating seat 132 and the material transfer robot arm 13 to move along the moving track 134.

[0052] Embodiment 3: On the basis of Example 1, add: Reference Figure 1 and Figure 5 The combined welding device 2 includes a welding gun 21, a welding gun bracket 22 and a fixed mold 23. The welding gun 21 is movably installed on the welding gun bracket 22 and performs routing welding on the titanium alloy plate under the control of the welding gun bracket 22. The fixed mold 23 is installed on the welding side of the welding gun 21 and carries and fixes the titanium alloy plate to be welded.

[0053] Reference Figure 1 The welding gun 21 includes a laser emitter 211 and a welding material conveyor 212. The laser emission front end of the laser emitter 211 and the welding material conveying front end of the welding material conveyor 212 are cross-connected. The laser emitter 211 is externally connected to a power supply and a start-stop controller. The welding material conveyor 212 is externally connected to a welding material installation storage device and draws out the welding material on the welding material installation storage device and conveys it to the titanium alloy plate welding position. The welding gun bracket 22 includes a mobile frame 221 and a swing frame 222. The welding gun 21 is mounted on the swing frame 222 and swings and moves with the swing frame 222. The swing frame 222 is movably mounted on the mobile frame 221. The mobile frame 221 controls and drives the swing frame 222 and the welding gun 21 to move. The fixed mold 23 is designed and customized according to the welding structure of the titanium alloy plate. The fixed mold 23 is installed and fixed on the mold bracket 231. The side and edge of the fixed mold 23 are installed with a mold clamp 232. The mold clamp 232 clamps the titanium alloy plate spliced ​​on the fixed mold 23.

[0054] Reference Figure 1 and Figure 5 The closed atmosphere device 3 includes a closed box 31, an atmosphere circulation port 32 and a heat-insulating electric heater 33. The atmosphere circulation port 32 is divided into an air inlet and an air outlet and are respectively opened on the corresponding two sides of the closed box 31. The closed box 31 is connected to an external protective gas supply device through the atmosphere circulation port 32. The heat-insulating electric heater 33 is installed in the closed box 31 and is externally connected to a power supply and a temperature controller.

[0055] Reference Figure 1 A sealing door 311 is installed on one side of the closed box body 31 to control the opening and closing. A sealing gasket 312 is attached to the inner side of the sealing door 311 at the contact surface with the closed box body 31. The sealing gasket 312 tightly fills the gap between the sealing door 311 and the closed box body 31. An observation window 313 is opened on the closed box body 31 and the sealing door 311. The observation window 313 is sealed by glass installation; The atmosphere circulation ports 32 on both sides of the closed box 31 are connected to an air inlet pipe 321 and an air outlet pipe 322 respectively. The air inlet pipe 321 is connected to a compressed protective gas box 324 via an air pump 323. The air pump 323 controls the protective gas to flow from the compressed protective gas box 324 into the closed box 31 along the air inlet pipe 321. The air outlet pipe 322 controls the gas in the closed box 31 to flow out via a switch valve. A circulating fan 331 is installed on the side of the heat preservation electric heater 33 facing the mold support 231 , and the circulating fan 331 is driven by a blower 332 to blow air toward the titanium alloy plate on the mold support 231 .

[0056] Open the gas supply system and slowly inject the shielding gas into the box. Meanwhile, exhaust the residual air in the box through the exhaust port. Set the flow rate and pressure of the shielding gas according to the welding process requirements.

[0057] Start the atmosphere circulation system to ensure uniform distribution of the protective gas in the box, keep the air pressure in the box stable, monitor the gas composition, and avoid the mixing of impurity gases that may affect the welding effect.

[0058] Embodiment 4: On the basis of Example 1, add: Reference Figure 1 , Figure 3 , Figure 5 and Figure 6 The quality inspection device 4 includes an indicator spraying port 41, an air blast port 42 and an observation monitoring head 43. The indicator spraying port 41 sprays an indicator toward the welded titanium alloy plate. The inside of the welded titanium alloy plate is connected to an external air blast device through the air blast port 42 and air is blown toward the inside of the welded titanium alloy plate. The observation monitoring head 43 is movably installed and controlled to move along the weld of the welded titanium alloy plate. The observation monitoring head 43 shoots the weld toward the titanium alloy plate.

[0059] Reference Figure 1 , Figure 3 , Figure 5 and Figure 6 The indicator spray port 41 is connected to the indicator material box 412 through a pipeline, and a spray valve 411 is installed on the pipeline connecting the indicator spray port 41 and the indicator material box 412, and the spray valve 411 controls the spraying and spraying speed of the indicator spray port 41; The blast port 42 is externally connected to a blower 421, through which air is blown into the titanium alloy plate to increase the internal air pressure. A closed joint 422 is provided at the pipe connection between the blast port 42 and the blower 421; The observation monitoring head 43 is installed on the monitoring moving frame 431 and is driven to move by the monitoring moving frame 431. The front end of the observation monitoring head 43 is converted and installed with a magnifying lens 432 and a developing lens 433.

[0060] Start the observation monitoring head 43, observe the bubble situation or color development situation of the weld through the high-power magnification lens 432 and the developing lens 433, record the defect image of the weld surface, and the automatic detection system can analyze the weld image and output the detection result.

[0061] Embodiment 5: The embodiment of the present invention discloses a method for welding a titanium alloy plate. Figure 1 , including the following welding process steps: S1, heating the titanium alloy plate waiting for welding after cutting, and uniformly heating the titanium alloy plate through the plate heating device 1; S2, quickly moving the heated titanium alloy plate to the combined welding device 2 for welding, wherein the welding steps mainly include: S2.1, placing the heated titanium alloy plate into the closed box 31 of the closed atmosphere device 3, and then sealing the titanium alloy plate in the closed box 31; S2.2, using the atmosphere circulation port 32 to inject protective gas into the closed box 31; S2.3, start the combined welding device 2 to weld the titanium alloy plate, open the closed box 31 after the welding is completed, and take out the welded titanium alloy plate; S3, placing the welded titanium alloy plates into the quality inspection device 4 to inspect the welding quality of the weld, and recovering the titanium alloy plates with unqualified welds for re-welding.

[0062] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the scope defined by the structure of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A titanium alloy plate welding device, characterized in that: include: A plate heating device (1) is used to pre-heat the cut titanium alloy plate; The combined welding device (2) is connected to the plate heating device (1) via a material transfer and conveying device, and receives the titanium alloy plate heated by the plate heating device (1) for welding; A closed atmosphere device (3) encloses the combined welding device (2) in a closed environment and controls the gas composition, gas pressure and temperature in the closed welding environment; The quality inspection device (4) is connected to the closed atmosphere device (3) via the material transfer and conveying device, and receives the titanium alloy plate formed by welding from the closed atmosphere device (3) to perform weld quality inspection.

2. A titanium alloy plate welding device according to claim 1, characterized in that: The plate heating device (1) comprises a heating box (11), a heating support (12) and a material transfer robot arm (13); the heating box (11) is a closed box structure; the heating support (12) is placed in the heating box (11) and supports the titanium alloy plate being heated; and the material transfer robot arm (13) is movably mounted on one side of the heating box (11).

3. A titanium alloy plate welding device according to claim 2, characterized in that: An electric heating wire (111) is installed on the inner wall of the heating box (11), and the electric heating wire (111) is externally connected to a power supply. The outer wall of the heating box (11) is wrapped with a heat-insulating shell (112), and the heat-insulating shell (112) is made of a fire-proof and high-temperature resistant material and is evenly coated on the outer wall of the heating box (11). A heat-insulating door (113) is installed on one side of the heating box (11), and one side of the heat-insulating door (113) is hinged on the side wall of the heating box (11), and the other side is open to the outside. The locking and opening are controlled by a lock, the outer surface of the heat-insulating door (113) is evenly coated with a fireproof and high-temperature resistant material and is combined and connected with the heat-insulating shell (112) wrapped on the outer wall of the heating box (11), the heat-insulating door (113) is provided with an observation port (114), and the observation port (114) is closed by glass installation, a temperature sensor (115) is installed and connected in the heating box (11), and the electric heating wire (111) and the temperature sensor (115) are externally connected to a temperature controller; A support roller (121) and a conveying roller (122) are rotatably mounted on the heating bracket (12); the support roller (121) and the conveying roller (122) are arranged in an alternating manner and their tops are flush with each other; and the conveying roller (122) is connected to a conveying motor (123) via a transmission structure; A material transfer roller frame (131) is installed at the front end of the material transfer mechanical arm (13); the bottom of the material transfer mechanical arm (13) is vertically rotatably installed on a rotating seat (132); a moving wheel (133) is rotatably installed on the bottom surface of the rotating seat (132); the moving wheel (133) is rollingly installed on a moving track (134) and drives the rotating seat (132) and the material transfer mechanical arm (13) to move along the moving track (134).

4. The titanium alloy plate welding device according to claim 1, characterized in that: The combined welding device (2) comprises a welding gun (21), a welding gun bracket (22) and a fixed mold (23); the welding gun (21) is movably mounted on the welding gun bracket (22) and performs line welding on the titanium alloy plate under the control of the welding gun bracket (22); the fixed mold (23) is mounted on the welding side of the welding gun (21) and supports and fixes the titanium alloy plate to be welded.

5. A titanium alloy plate welding device according to claim 4, characterized in that: The welding gun (21) comprises a laser emitter (211) and a welding material conveyor (212); a laser emission front end of the laser emitter (211) and a welding material conveyor front end of the welding material conveyor (212) are cross-jointed; the laser emitter (211) is externally connected to a power supply and a start / stop controller; the welding material conveyor (212) is externally connected to a welding material installation storage device and draws out welding material from the welding material installation storage device and conveys it to a welding position of a titanium alloy plate; The welding gun support (22) comprises a movable frame (221) and a swing frame (222); the welding gun (21) is mounted on the swing frame (222) and swings and moves along with the swing frame (222); the swing frame (222) is movably mounted on the movable frame (221); and the movable frame (221) controls and drives the swing frame (222) and the welding gun (21) to move; The fixed mold (23) is designed and customized according to the titanium alloy plate welding structure. The fixed mold (23) is installed and fixed on the mold bracket (231). The side and edge of the fixed mold (23) are installed with a mold clamp (232). The mold clamp (232) clamps the titanium alloy plate spliced ​​on the fixed mold (23).

6. A titanium alloy plate welding device according to claim 5, characterized in that: The closed atmosphere device (3) comprises a closed box (31), an atmosphere circulation port (32) and a heat-insulating electric heater (33); the atmosphere circulation port (32) is divided into an air inlet and an air outlet and is respectively provided on two corresponding sides of the closed box (31); the closed box (31) is externally connected to a protective gas supply device via the atmosphere circulation port (32); the heat-insulating electric heater (33) is installed in the closed box (31) and is externally connected to a power supply and a temperature controller.

7. A titanium alloy plate welding device according to claim 6, characterized in that: A sealing door (311) is installed on one side of the closed box (31) to control opening and closing. A sealing gasket (312) is attached to the inner side of the sealing door (311) at the contact surface with the closed box (31). The sealing gasket (312) tightly fills the gap between the sealing door (311) and the closed box (31). Both the closed box (31) and the sealing door (311) are provided with an observation window (313), and the observation window (313) is sealed by installing glass; The atmosphere circulation ports (32) on the corresponding sides of the closed box (31) are respectively connected to an air inlet pipe (321) and an air outlet pipe (322); the air inlet pipe (321) is connected to a compressed protective gas box (324) via an air pump (323); the air pump (323) controls the protective gas to flow from the compressed protective gas box (324) along the air inlet pipe (321) into the closed box (31); the air outlet pipe (322) controls the gas in the closed box (31) to flow out via a switch valve; A circulating fan (331) is installed on the side of the heat-insulating electric heater (33) facing the mold support (231), and the circulating fan (331) is driven by a fan (332) to blow air toward the titanium alloy plate on the mold support (231).

8. The titanium alloy plate welding device according to claim 1, characterized in that: The quality inspection device (4) comprises an indicator spraying port (41), an air blast port (42) and an observation monitoring head (43); the indicator spraying port (41) sprays an indicator toward a welded titanium alloy plate; the interior of the welded titanium alloy plate is connected to an external air blast device through the air blast port (42) and air is blown toward the interior of the welded titanium alloy plate; the observation monitoring head (43) is movably installed and controlled to move along the weld of the welded titanium alloy plate; the observation monitoring head (43) photographs the weld toward the titanium alloy plate.

9. A titanium alloy plate welding device according to claim 8, characterized in that: The indicator spray port (41) is connected to the indicator material box (412) via a pipeline, and a spray valve (411) is installed on the pipeline connecting the indicator spray port (41) and the indicator material box (412), and the spray valve (411) controls the spraying and spraying speed of the indicator spray port (41); The blast port (42) is externally connected to a blower (421), and air is blown into the titanium alloy plate through the blower (421) to increase the internal air pressure. A closed joint (422) is provided at the pipe connection where the blast port (42) and the blower (421) are connected. The observation monitoring head (43) is mounted on the monitoring movable frame (431) and is driven to move by the monitoring movable frame (431); a magnifying lens (432) and a developing lens (433) are installed on the front end of the observation monitoring head (43).

10. A method for welding a titanium alloy plate, using a titanium alloy plate welding device according to any one of claims 1 to 9, characterized in that: The welding process includes the following steps: S1, heating the titanium alloy plate that is cut and waiting to be welded, and uniformly heating the titanium alloy plate by a plate heating device (1); S2. The heated titanium alloy plate is quickly moved to the combined welding device (2) for welding, wherein the welding steps mainly include: S2.

1. placing the heated titanium alloy plate in a closed box (31) of a closed atmosphere device (3), and then sealing the titanium alloy plate in the closed box (31); S2.2, using the atmosphere circulation port (32) to inject protective gas into the closed box (31); S2.3, start the combined welding device (2) to weld the titanium alloy plate, open the closed box (31) after the welding is completed, and take out the welded titanium alloy plate; S3, placing the welded titanium alloy plates into a quality inspection device (4) to inspect the quality of the weld seams, and recovering the titanium alloy plates with unqualified weld seams for re-welding.

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