High-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding

Abstract

The invention discloses a high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding, which relates to the technical field of welding and comprises a hollow tungsten electrode, a tungsten electrode clamp, a first air inlet, a wire feeding port and a first cavity formed in the axis area of the hollow tungsten electrode. The second cavity, the third cavity, the fourth cavity and the fifth cavity are sequentially arranged outwards with the axis of the first cavity as the center, the first air inlet is connected to the wire feeding port, and a welding wire and inert gas spirally penetrate through the third cavity to be downwards conveyed to the position above a welding area of a to-be-welded plate through the wire feeding port and the first air inlet. And an electromagnetic valve is arranged at the input end of the first air inlet. According to the high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding, the integration level of the composite welding torch is improved, impurity attachments at the positions of the hollow tungsten electrode, the second cavity, the third cavity and the fourth cavity at the output port of the welding torch can be effectively cleaned, and the welding power can be further improved.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and specifically to a high-power laser-hollow tungsten electrode composite torch for titanium alloy welding. Background Art

[0002] Titanium alloy welding is widely used in fields such as aerospace (engine components, fuselage), chemical industry (corrosion-resistant equipment), medical (implants), and ocean engineering. Since titanium alloy welding is a process with relatively high technical requirements, due to its characteristics such as active chemical properties, poor thermal conductivity, and easy oxidation, the welding environment and parameters need to be strictly controlled. Laser-hollow tungsten electrode welding (LHTEW) is a composite welding technology that combines laser and arc, showing unique advantages in titanium alloy welding, especially suitable for scenarios with high precision, low heat input, and high efficiency requirements.

[0003] A laser-hollow tungsten electrode arc coaxial composite torch with the application number CN202510072232.6, through the focusing action of the first laser beam arranged in the hollow tungsten electrode, the arc of the hollow tungsten electrode, and the second laser beam located outside the hollow tungsten electrode and placed in the second chamber, greatly improves the welding energy of the laser-hollow tungsten electrode coaxial composite torch. By setting the fourth chamber, under the action of the hollow fan, the impurities generated by the cleaning of the third laser beam can be removed, and the plasma plume generated by the plume effect occurring in the welding area can also be removed, avoiding laser energy loss and ensuring the welding quality to a certain extent. However, in this application, the space utilization of the composite torch is not sufficient enough, which may cause a relatively large volume, and after the long-term operation of this composite torch, there will still be some impurities such as metal vapor, oxides, and plasma plume attached to the tungsten electrode, the torch output port, etc., affecting the welding efficiency and welding quality. Summary of the Invention

[0004] The purpose of the present invention is to disclose a high-power laser-hollow tungsten electrode composite torch for titanium alloy welding to solve the problems raised in the above background art.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A high-power laser-hollow tungsten electrode composite torch for titanium alloy welding includes a laser emission device, a hollow tungsten electrode, a tungsten electrode clamp, a first air inlet, a wire feeding port, and a first chamber formed in the axial center region of the hollow tungsten electrode. It further includes a second chamber, a third chamber, a fourth chamber, and a fifth chamber arranged in sequence outward with the axis of the first chamber as the center. It is characterized in that the first air inlet is connected to the wire feeding port, and the welding wire and the inert gas respectively pass through the wire feeding port and the first air inlet in a spiral shape through the third chamber and are sent downward to the upper part of the welding area of the to-be-welded plate. A solenoid valve is arranged at the input end of the first air inlet.

[0006] Optionally, a hollow shaft motor is provided at the upper part of the hollow tungsten electrode. Under the action of a hollow fan connected to the output shaft of the hollow shaft motor, the inert gas containing welding impurities flows upward through the fourth chamber.

[0007] Optionally, the first laser beam emitted from the central region of the laser emitting device passes through the first chamber and irradiates the central welding area of the plate to be welded. The second laser beam emitted by the laser emitting device sequentially passes through the through hole of the tungsten electrode clamp in the second chamber and the first hollow refractive lens and irradiates the welding area of the plate to be welded. The third laser beam emitted by the laser emitting device or the annular laser diode built in the fifth chamber passes through the second hollow refractive lens in the fifth chamber and irradiates the periphery of the welding area of the plate to be welded.

[0008] Optionally, it further includes a second air inlet and a sixth chamber provided between the fourth chamber and the fifth chamber. The shielding gas acts downward on the welding area of the plate to be welded through the second air inlet and the sixth chamber respectively.

[0009] Optionally, the inert gas is a plasma gas and the shielding gas is pure argon.

[0010] Optionally, it further includes a wire feeding roller. Both the wire feeding roller and the hollow shaft motor have forward and reverse functions. When the hollow shaft motor rotates forward, the inert gas containing welding impurities flows upward through the fourth chamber. When the hollow shaft motor rotates in reverse, the fourth chamber is cleaned by the wind force.

[0011] Optionally, it further includes an adjusting assembly. A motor shaft collar is provided at the output end of the hollow shaft motor. A ratchet ring is connected to the inner ring of the collar. The ratchet ring is connected to the adjusting assembly. The adjusting assembly is used to adjust the position of the hollow tungsten electrode and clean the hollow tungsten electrode through the second laser beam.

[0012] Optionally, the adjusting assembly includes a ratchet ring connected to the ratchet ring. A ratchet shaft is provided at the center of the ratchet ring. The ratchet ring includes ratchet claws and elastic members arranged in an annular array. The tail ends of the ratchet claws are connected to the ratchet shaft through hinge shafts, and the head ends of the ratchet claws are connected to the ratchet shaft through elastic members. A reciprocating screw is connected below the ratchet shaft. A slider is connected to the reciprocating screw. The lower end of the slider is connected to a transmission rod, and the other end of the transmission rod is connected to the tungsten electrode clamp.

[0013] Optionally, it further includes a first temperature sensor provided below the second chamber, a second temperature sensor provided below the third chamber, and a gas flow rate sensor provided below the fourth chamber.

[0014] Optionally, the first hollow refractive lens plays a role of focusing light, and the second laser beam is focused above the welding area of the plate to be welded after passing through the first hollow refractive lens.

[0015] Technical effects and advantages of the present invention: 1. In the present invention, the first air inlet is connected to the wire feeding port, and the welding wire and the inert gas share the third chamber, effectively saving the space of the composite welding torch and improving the integration of the composite welding torch.

[0016] 2. In the present invention, a motor shaft collar is arranged at the output end of the hollow shaft motor. A ratchet ring is connected to the inner ring of the shaft collar, and the ratchet ring is connected to a regulating component. Under the combined action of components such as a ratchet pawl, an elastic member, a reciprocating screw, a slider, and a transmission rod in the regulating component, the up-and-down reciprocating adjustment of the tungsten electrode clamp is realized, and then the up-and-down reciprocating adjustment of the hollow tungsten electrode is realized. Then, the impurity attachments on the periphery of the output end of the hollow tungsten electrode in the second chamber of the composite welding torch are effectively cleaned by using the energy of the second laser beam.

[0017] 3. In the present invention, the welding wire and the inert gas respectively pass through the wire feeding port and the first air inlet in a spiral shape and are sent downward to the upper part of the welding area of the to-be-welded plate through the third chamber. And a solenoid valve is arranged at the input end of the first air inlet. By the pulse adjustment of the solenoid valve, the welding wire can vibrate in the third chamber, realizing the cleaning of the impurity attachments in the second chamber of the composite welding torch.

[0018] 4. In the present invention, through the combined action of the gas flow rate sensor below the fourth chamber, the hollow shaft motor above the fourth chamber, and the hollow fan, the hollow fan blows downward to realize the cleaning of the impurity attachments in the fourth chamber of the composite welding torch.

[0019] 5. In the present invention, the welding wire is in a spiral shape in the third chamber. Compared with the prior art, the welding wire is closer to the hollow tungsten electrode. During welding, the hollow tungsten electrode can preheat the welding wire in advance, which is more conducive to the welding wire being heated and melted when it reaches the welding area. Description of the drawings

[0020] Figure 1 Schematic diagram of the structure of the laser-hollow tungsten electrode arc coaxial composite welding torch according to an embodiment of the present invention; Figure 2 Schematic diagram of the structure of the laser-hollow tungsten electrode arc coaxial composite welding torch according to an embodiment of the present invention; Figure 3 Schematic diagram of the position of the regulating component in the laser-hollow tungsten electrode arc coaxial composite welding torch according to an embodiment of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural schematic diagram of part A; Figure 5 Top view of components such as the ratchet pawl wheel and the ratchet ring of the regulating component of the present invention.

[0021] In the figure: 1. Laser emission device; 2. Hollow fan; 3. Hollow shaft motor; 301. Motor shaft collar; 302. Ratchet ring; 4. Hollow tungsten electrode; 5. Tungsten electrode clamp; 6. First hollow refractive lens; 7. Second hollow refractive lens; 8. Electric arc; 9. Adjustment assembly; 901. Ratchet wheel; 9011. Pawl; 9012. Elastic member; 902. Ratchet shaft; 903. Reciprocating screw; 904. Slide block; 905. Transmission rod; 10. First laser beam; 11. Second laser beam; 12. First chamber; 13. Second chamber; 14. Third chamber; 15. Fourth chamber; 16. Fifth chamber; 17. Sixth chamber; 18. Welding wire; 19. Ring laser diode; 20. Third laser beam; 21. Electrical interface; 22. First air inlet; 23. Wire feeding port; 24. Second air inlet; 25. Wire feeding roller; 26. Plate to be welded. Detailed implementation manners

[0022] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0023] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0024] Please refer to Figure 1, this embodiment discloses a high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding, which includes a laser emission device 1, a hollow tungsten electrode 4, a tungsten electrode clamp 5, a first air inlet 22, a wire feeding port 23, and a first chamber 12 formed in the axial center region of the hollow tungsten electrode 4. It further includes a second chamber 13, a third chamber 14, a fourth chamber 15, and a fifth chamber 16 arranged in sequence outward with the axial center of the first chamber 12 as the center. Among them, the first laser beam 10 emitted from the central region of the laser emission device 1 passes through the first chamber 12 and irradiates the central welding area of the to-be-welded plate 26. In the upper part of the second chamber 13, a tungsten electrode clamp 5 is installed, and in the lower part, a first hollow refractive lens 6 is installed. The tungsten electrode clamp 5 is provided with a through hole at the central axis position in the second chamber 13. The second laser beam 11 emitted by the laser emission device 1 sequentially passes through the through hole of the tungsten electrode clamp 5 in the second chamber 13 and the first hollow refractive lens 6 and irradiates the welding area of the to-be-welded plate 26. A hollow shaft motor 3 is arranged at the upper part of the hollow tungsten electrode 4. The inert gas acts downward on the welding area through the third chamber 14. A hollow shaft motor 3 is arranged at the upper part of the hollow tungsten electrode 4. The output shaft of the hollow shaft motor 3 is connected with a hollow fan 2. The first laser beam 10 and the second laser beam 11 enter the first chamber 12 and the second chamber 13 respectively through the hollow areas of the hollow fan 2 and the hollow shaft motor 3. The fan blades of the hollow fan 2 are located at the uppermost end of the fourth chamber 15. Under the upward suction of the hollow fan 2 connected to the output shaft of the hollow shaft motor 3, the inert gas containing welding impurities flows back upward through the fourth chamber 15. A second hollow refractive lens 7 is arranged at the lower part of the fifth chamber 16. The third laser beam 20 emitted by the laser emission device 1 passes through the second hollow refractive lens 7 in the fifth chamber 16 and irradiates the periphery of the welding area of the to-be-welded plate 26.

[0025] Further, the first air inlet 22 is connected to the wire feeding port 23. The welding wire 18 and the inert gas respectively pass through the wire feeding port 23 and the first air inlet 22 in a spiral shape and are sent downward to the upper part of the welding area of the to-be-welded plate 26 through the third chamber 14. In this way, in this embodiment, by connecting the first air inlet 22 to the wire feeding port 23, the welding wire 18 and the inert gas share the third chamber 14, effectively saving the space of the composite welding torch and improving the integration degree of the composite welding torch. At the same time, compared with the background technology, the welding wire 18 is closer to the hollow tungsten electrode 4. During welding, the hollow tungsten electrode 4 can preheat the welding wire 18 in advance, which is more conducive to the welding wire 18 being heated and melted when it reaches the welding area.

[0026] Further, in this embodiment, a solenoid valve is provided at the input end of the first air inlet 22. The solenoid valve can adjust the air intake of the first air inlet 22. When the welding power is large, the controller of the welding equipment or manual adjustment increases the opening degree of the solenoid valve of the composite welding torch, and the air intake of the first air inlet 22 increases. A large amount of inert gas acts downward on the welding area through the third chamber 14 to better act on the welding area; when the welding power is small, the controller of the welding equipment or manual adjustment reduces the opening degree of the solenoid valve, just to meet the basic welding requirements and avoid waste of resources.

[0027] Further, after regular use, inevitably, after the long-term operation of the composite welding torch, there will still be some impurities such as metal vapor, oxides, and plasma plume attached to the output ports of the second chamber 13 and the third chamber 14 of the welding torch, affecting the welding efficiency and quality. At this time, according to the cumulative working hours of the load welding torch, the solenoid valve can be periodically set to perform pulsed opening and closing adjustment. The pulsed inert gas can cause the welding wire 18 to vibrate in the third chamber 14, and then drive the chamber wall of the third chamber 14 to vibrate, further realizing the cleaning of the impurity attachments at the head end of the welding torch of the second chamber 13 and the third chamber 14 in the composite welding torch.

[0028] Please refer to the attached Figure 2 , on the basis of the attached Figure 1 , it further includes a second air inlet 24 and a sixth chamber 17 provided between the fourth chamber 15 and the fifth chamber 16. The shielding gas acts downward on the welding area of the to-be-welded plate 26 through the second air inlet 24 and the sixth chamber 17 respectively. In this embodiment, the inert gas is a plasma gas, and the shielding gas is pure argon. In this way, double gas protection of the composite welding torch during titanium alloy welding is achieved. The plasma arc formed by the plasma gas provides a stable high-temperature heat source, enabling the titanium alloy to be quickly melted and obtaining good penetration and bead width; the shielding gas effectively isolates the air, preventing the titanium alloy from being oxidized, nitrided, and hydrogen-absorbed at high temperatures, thereby reducing the generation of welding defects and improving the mechanical properties and corrosion resistance of the weld.

[0029] In addition, in the attached Figure 2 , the third laser beam 20 emitted by the ring laser diode 19 built in the fifth chamber 16 passes through the second hollow refractive lens 7 in the fifth chamber 16 and irradiates the periphery of the welding area of the to-be-welded plate 26.

[0030] Please refer to the attached Figure 1 -attached Figure 3 , the composite welding torch further includes a wire feeding roller 25. Both the wire feeding roller 25 and the hollow shaft motor 3 have forward and reverse functions. When the hollow shaft motor 3 rotates forward, the inert gas containing welding impurities flows upward through the fourth chamber 15. When the hollow shaft motor 3 rotates in reverse, the fourth chamber 15 is cleaned by the wind force.

[0031] In this embodiment, the vibration of the welding wire 18 in the third chamber 14 is achieved by the pulse adjustment of the solenoid valve, realizing partial cleaning of the impurity attachments at the head ends of the torch in the second chamber 13 and the third chamber 14 of the composite torch. However, the cleaning effect of the impurity attachments at the head ends of the torch in the second chamber 13 and the third chamber 14 by the vibration of the welding wire 18 due to the inert gas is limited. When the attached impurities are stubborn, the impurity attachments at the head ends of the torch in the second chamber 13 and the third chamber 14 cannot be cleaned thoroughly. Therefore, the composite torch provided in this embodiment further includes a wire feeding roller 25, and the wire feeding roller 25 has a forward and reverse rotation function. At the same time, it also includes a second temperature sensor disposed below the third chamber 14. When the composite torch works for a long time and the ambient temperature detected by the second temperature sensor is less than a preset first threshold, at this time, it indicates that the area below the third chamber 14 is slightly covered with impurities. If it is not cleaned in time, it will slightly affect the gas outlet volume of the inert gas for wire feeding. At this time, the controller of the welding equipment controls the solenoid valve to open maximally, and the inert gas is transmitted downward through the third chamber 14, and a large flow of the inert gas is used to blow and clean the impurities below the third chamber; when the composite torch works for a long time and the ambient temperature detected by the second temperature sensor is less than a preset second threshold, it indicates that the area below the third chamber is covered with impurities moderately. If it is not cleaned in time, it will affect the wire feeding smoothness and the gas outlet volume of the inert gas. At this time, the controller of the welding equipment controls the pulse opening and closing adjustment of the solenoid valve, and the pulsed inert gas drives the welding wire 18 in the third chamber to vibrate, and the welding wire 18 performs pulsed vibration cleaning on the impurities below the third chamber; when the composite torch works for a long time and the ambient temperature detected by the second temperature sensor is less than a preset third threshold, it indicates that the area below the third chamber is severely covered with impurities partially. At this time, if it is not cleaned in time, it will affect the wire feeding and the gas outlet of the inert gas. At this time, the controller of the welding equipment controls the pulse opening and closing adjustment of the solenoid valve, and the pulsed inert gas drives the welding wire 18 in the third chamber to vibrate horizontally, realizing the vibration cleaning of the impurities below the third chamber by the welding wire 18. At the same time, the controller of the welding equipment controls the wire feeding roller 25 to rotate forward and reverse frequently, driving the welding wire 18 to perform reciprocating longitudinal collision cleaning on the impurities below the third chamber. In this way, high-strength cleaning of the impurities below the third chamber 14 is achieved.

[0032] Furthermore, in this embodiment, the hollow shaft motor 3 also has a forward and reverse rotation function. When the hollow shaft motor 3 rotates forward, the inert gas containing welding impurities flows back upward through the fourth chamber 15. When the hollow shaft motor 3 rotates reversely, the wind force is downward, so as to clean the lower end of the fourth chamber 15. In this embodiment, the composite welding torch also includes a gas flow rate sensor arranged below the fourth chamber. When the mismatch between the gas flow rate data detected by the gas flow rate sensor and the rotation speed of the hollow shaft motor 3 reaches a preset threshold, it indicates that there are many impurities attached to the fourth chamber 15. If it is not cleaned in time, it will affect the extraction of impurities such as the oxide layer, dust, and attachments of the plate 26 to be welded by the third laser beam 20, and at the same time affect the extraction of the plasma plume generated by the plume effect in the welding zone. At this time, the controller of the welding equipment controls the hollow shaft motor 3 to reverse, and the hollow fan 2 blows downward to clean the impurity attachments in the fourth chamber 15 of the composite welding torch.

[0033] The above embodiments achieve the cleaning of impurity attachments in the second chamber 13, the third chamber 14, and the fourth chamber 15, but the technical solutions in the above embodiments cannot achieve the cleaning of impurity attachments on the surface of the hollow tungsten electrode 4. When impurities such as oxides and metal vapor attachments exist on the surface of the hollow tungsten electrode 4, the temperature at the output end of the tungsten electrode will be affected, resulting in insufficient power of the composite welding torch. Based on this, the following improvements are further made in this embodiment.

[0034] Please refer to the attached Figure 3 -Attached Figure 5 The composite welding torch also includes an adjustment component 9. A motor shaft ring 301 is set at the output end of the hollow shaft motor 3. The inner ring of the motor shaft ring 301 is connected with a ratchet ring 302. The inner ring of the ratchet ring 302 is connected with the adjustment component 9. The adjustment component 9 is used to adjust the position of the hollow tungsten pole 4 and clean the hollow tungsten pole 4 through the second laser beam 11.

[0035] Specifically, the adjustment component 9 includes a ratchet wheel 901 connected to the ratchet ring 302, a ratchet shaft 902 is arranged at the center of the ratchet wheel 901, and the ratchet wheel 901 includes a ratchet 9011 and an elastic member 9012 arranged in a ring array, the tail end of the ratchet 9011 is connected to the ratchet shaft 902 through a hinge shaft, and the head end of the ratchet 9011 is connected to the ratchet shaft 902 through an elastic member 9012, a reciprocating screw 903 is connected below the ratchet shaft 902, a slider 904 is connected to the reciprocating screw 903, a transmission rod 905 is connected to the lower end of the slider 904, and the other end of the transmission rod 905 is connected to the tungsten electrode clamp 5.

[0036] During actual use, under normal circumstances, the hollow shaft motor 3 drives the hollow fan 2 to rotate forward, sucking air upward. Oxide layers, dust, attachments and other impurities lifted around the welding area near the lower part of the fourth chamber 15 and the plasma plume particles in the welding area enter the fourth chamber 15 and are extracted by the fan blades of the hollow fan 2. When the hollow shaft motor 3 rotates forward, the ratchet ring 302 rotates counterclockwise in the schematic diagram of Figure 5 , and the ratchet ring 302 will not be engaged and driven with any of the ratchets 9011 of the ratchet wheel 901 in the adjusting assembly 9. After the ratchet teeth of the ratchet ring 302 contact the ratchet 9011, the elastic member 9012 is in a compressed state, and the ratchet shaft 902 does not rotate.

[0037] After the composite torch is used for a long time, impurities accumulate at the lower end of the hollow tungsten electrode, which will affect the welding power of the composite torch. At this time, control the hollow shaft motor 3 to rotate reversely. The ratchet ring 302 rotates clockwise in the schematic diagram of Figure 5 . The ratchet ring 302 is engaged and driven with the ratchet 9011 of the ratchet wheel 901 in the adjusting assembly 9. After the ratchet teeth of the ratchet ring 302 contact the ratchet 9011, the elastic member 9012 is in an extended state, and the ratchet shaft 902 rotates. As the ratchet shaft 902 rotates, the reciprocating screw 903 connected to the lower end of the ratchet shaft 902 rotates. The slider 904 on the reciprocating screw 903 reciprocates up and down in the slideway of the reciprocating screw 903, driving the transmission rod 905 to reciprocate up and down, further driving the tungsten electrode clamp 5 and the hollow tungsten electrode 4 to reciprocate up and down. At this time, the second laser beam 11 can act on the lower end of the hollow tungsten electrode 4 reciprocally to perform laser cleaning on the impurities attached to the lower end of the hollow tungsten electrode 4, realizing the cleaning of the hollow tungsten electrode 4.

[0038] Furthermore, a first temperature sensor can be set below the second chamber 13. When the composite torch works for a long time and the ambient temperature detected by the first temperature sensor is less than the preset threshold, it indicates that the lower end of the hollow tungsten electrode below the second chamber is moderately covered with impurities. If it is not cleaned in time, it will affect the tungsten electrode welding power. At this time, the controller of the welding equipment controls the hollow shaft motor 3 to rotate reversely, realizes the reciprocating movement of the tungsten electrode clamp 5 and the hollow tungsten electrode 4 through the adjusting assembly 9, and realizes the laser cleaning of the lower end of the hollow tungsten electrode 4 through the second laser beam 11.

[0039] Furthermore, the composite torch of this embodiment further includes an electrical interface 21 arranged outside the torch, and the electrical interface 21 is used to supply power to the hollow tungsten electrode 4 and the annular laser diode 19.

[0040] Further, the first hollow refractive lens 6 functions to condense light. After passing through the first hollow refractive lens 6, the second laser beam 11 is condensed above the welding area of the to-be-welded plate 26. The third laser beam 20 is circular or annular or arc-shaped or arc-surface-shaped. When the third laser beam 20 operates in a circular shape, it can roughly clean the periphery of the to-be-welded area in advance and roughly clean impurities such as the oxide layer and welding slag after welding. When the third laser beam 20 operates in an annular shape, it can more carefully clean the periphery of the to-be-welded area in advance and carefully clean impurities such as the oxide layer and welding slag after welding.

[0041] In this embodiment, the first air inlet is connected to the wire feeding port, and the welding wire and the inert gas share the third chamber, effectively saving the space of the composite welding torch and improving the integration degree of the composite welding torch; by arranging a motor collar at the output end of the hollow shaft motor, a ratchet ring is connected to the inner ring of the collar, and the ratchet ring is connected to a regulating component. Under the cooperative action of components such as the pawl, elastic member, reciprocating screw, slider, and transmission rod in the regulating component, the up-and-down reciprocating adjustment of the tungsten electrode clamp is realized, and then the up-and-down reciprocating adjustment of the hollow tungsten electrode is realized. Then, the energy of the second laser beam is used to effectively clean the impurity attachments on the periphery of the output end of the hollow tungsten electrode in the second chamber of the composite welding torch; the welding wire and the inert gas respectively pass through the wire feeding port and the first air inlet in a spiral shape and are sent downward to the upper part of the welding area of the to-be-welded plate through the third chamber. And a solenoid valve is arranged at the input end of the first air inlet. By the pulse adjustment of the solenoid valve, the welding wire can vibrate in the third chamber to realize the cleaning of the impurity attachments in the second chamber of the composite welding torch; through the cooperative action of the gas flow sensor below the fourth chamber, the hollow shaft motor above the fourth chamber, and the hollow fan, the hollow fan blows downward to realize the cleaning of the impurity attachments in the fourth chamber of the composite welding torch; in addition, in this embodiment, the welding wire is spiral in the third chamber. Compared with the prior art, the welding wire is closer to the hollow tungsten electrode. During welding, the hollow tungsten electrode can preheat the welding wire in advance, which is more conducive to the welding wire being heated and melted when it reaches the welding area.

[0042] The above are only the embodiments of the present invention, and thus do not limit the patent scope of the present invention. All equivalent transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, are equally included in the patent protection scope of the present invention.

Claims

1. A high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding, comprising a laser emitting device (1), a hollow tungsten electrode (4), a tungsten electrode clamp (5), a first air inlet (22), a wire feed port (23), a first chamber (12) formed by the axial region of the hollow tungsten electrode (4), and further comprising a second chamber (13), a third chamber (14), a fourth chamber (15), and a fifth chamber (16) arranged in sequence outwardly from the axial center of the first chamber (12), characterized in that: The first air inlet (22) is connected to the wire feeding port (23), and the welding wire (18) and the inert gas are respectively fed through the wire feeding port (23) and the first air inlet (22) in a spiral shape through the third chamber (14) and downwardly to the top of the welding area of ​​the plate (26) to be welded, and a solenoid valve is provided at the input end of the first air inlet (22).

2. The high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding according to claim 1, characterized in that: A hollow shaft motor (3) is arranged on the upper part of the hollow tungsten pole (4), and under the action of a hollow fan (2) connected to the output shaft of the hollow shaft motor (3), inert gas containing welding impurities flows back upward through the fourth chamber (15).

3. The high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding according to claim 1, characterized in that: The first laser beam (10) emitted from the central area of ​​the laser emitting device (1) passes through the first chamber (12) and irradiates the central welding area of ​​the plate (26) to be welded, and the second laser beam (11) emitted from the laser emitting device (1) passes through the through hole of the tungsten electrode clamp (5) in the second chamber (13) and the first hollow refractive lens (6) in sequence and irradiates the welding area of ​​the plate (26) to be welded; The third laser beam (20) emitted by the laser emitting device (1) or the ring laser diode (19) built into the fifth chamber (16) passes through the second hollow refractive lens (7) in the fifth chamber (16) and irradiates the periphery of the welding area of ​​the plate (26) to be welded.

4. The high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding according to claim 2, characterized in that: It also includes a second air inlet (24) and a sixth chamber (17) arranged between the fourth chamber (15) and the fifth chamber (16), and the protective gas acts downward on the welding area of ​​the plate (26) to be welded through the second air inlet (24) and the sixth chamber (17) respectively.

5. The high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding according to claim 4, characterized in that: The inert gas is plasma gas, and the protective gas is pure argon.

6. The high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding according to claim 2, characterized in that: It also includes a wire feeding roller (25), wherein the wire feeding roller (25) and the hollow shaft motor (3) both have forward and reverse rotation functions. When the hollow shaft motor (3) rotates forward, inert gas containing welding impurities flows back upward through the fourth chamber (15); when the hollow shaft motor (3) rotates reversely, wind cleans the fourth chamber (15).

7. The high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding according to claim 3, characterized in that: It also comprises an adjustment component (9), wherein the output end of the hollow shaft motor (3) is provided with a motor collar (301), the inner ring of the collar is connected to a ratchet ring (302), the ratchet ring (302) is connected to the adjustment component (9), and the adjustment component (9) is used to adjust the position of the hollow tungsten pole (4), and clean the hollow tungsten pole (4) through the second laser beam (11).

8. The high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding according to claim 7, characterized in that: The adjustment assembly (9) comprises a ratchet wheel (901) connected to the ratchet ring (302), a ratchet shaft (902) being arranged at the center of the ratchet wheel (901), and the ratchet wheel (901) comprises ratchets (9011) and elastic members (9012) arranged in a ring array, the tail end of the ratchet (9011) being connected to the ratchet shaft (902) via a hinge shaft, the head end of the ratchet (9011) being connected to the ratchet shaft (902) via an elastic member (9012), a reciprocating screw (903) being connected below the ratchet shaft (902), a slider (904) being connected to the reciprocating screw (903), a transmission rod (905) being connected to the lower end of the slider (904), and the other end of the transmission rod (905) being connected to a tungsten electrode clamp (5).

9. The high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding according to claim 2, characterized in that: It also includes a first temperature sensor arranged below the second chamber, a second temperature sensor arranged below the third chamber, and a gas flow rate sensor arranged below the fourth chamber.

10. The high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding according to claim 3, characterized in that: The first hollow refractive lens (6) plays a focusing role, and the second laser beam (11) is focused above the welding area of ​​the plate (26) to be welded after passing through the first hollow refractive lens (6).

Images