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

Abstract

The present invention discloses a high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding, which relates to the field of welding technology. The torch comprises a hollow tungsten electrode, a tungsten electrode clamp, a first air inlet, a wire feed port, and a first chamber formed by the axial region of the hollow tungsten electrode. The torch also comprises a second chamber, a third chamber, a fourth chamber, and a fifth chamber arranged outwardly from the axis of the first chamber. The first air inlet is connected to the wire feed port, and the welding wire and inert gas are respectively fed through the wire feed port and the first air inlet in a spiral shape through the third chamber and downward to the welding area above the plate to be welded. A solenoid valve is provided at the input end of the first air inlet. The high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding proposed by the present invention improves the integration of the composite welding torch and can effectively clean impurities and attachments at the hollow tungsten electrode, the second chamber, the third chamber, and the fourth chamber at the torch output port, further increasing the welding power.

Description

Technical Field

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

[0002] Titanium alloy welding is widely used in aerospace (engine components, fuselages), chemical engineering (corrosion-resistant equipment), medical (implants), and marine engineering. Because titanium alloy welding is a technically demanding process, due to its active chemical properties, poor thermal conductivity, and susceptibility to oxidation, the welding environment and parameters must be strictly controlled. Laser-Hollow Tungsten Electrode Welding (LHTEW), a hybrid welding technology combining laser and arc, exhibits unique advantages in titanium alloy welding and is particularly suitable for applications requiring high precision, low heat input, and high efficiency.

[0003] Application number CN202510072232.6 is a laser-hollow tungsten electrode arc coaxial composite welding torch. Through the focusing action of a first laser beam disposed in the hollow tungsten electrode, the arc of the hollow tungsten electrode, and a second laser beam located outside the hollow tungsten electrode and placed in a second chamber, the laser-hollow tungsten electrode coaxial composite welding torch significantly improves the welding energy. By providing a fourth chamber, the hollow fan can remove impurities generated by the third laser beam cleaning and the plasma plume generated by the plume effect in the welding area, thereby avoiding laser energy loss and ensuring welding quality to a certain extent. However, the composite welding torch in this application does not fully utilize the space, which may result in a larger volume. Moreover, after long-term operation, some impurities such as metal vapor, oxides, and plasma plume will still adhere to the tungsten electrode, the torch output port, etc., affecting 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 welding torch for titanium alloy welding, so as to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding, comprising a laser emitting device, a hollow tungsten electrode, a tungsten electrode clamp, a first air inlet, a wire feed port, and a first chamber formed by the axial area of the hollow tungsten electrode, and also comprising 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, characterized in that the first air inlet is connected to the wire feed port, and the welding wire and inert gas are respectively fed through the wire feed port and the first air inlet in a spiral shape through the third chamber and downward to the top of the welding area of the plate to be welded, and an electromagnetic valve is provided at the input end of the first air inlet.

[0006] Optionally, a hollow shaft motor is provided on the upper portion of the hollow tungsten pole, and under the action of a hollow fan connected to the output shaft of the hollow shaft motor, the inert gas containing welding impurities flows back upward through the fourth chamber.

[0007] Optionally, the first laser beam emitted from the central area of the laser emitting device passes through the first chamber and irradiates the central welding area of the plate to be welded, and the second laser beam emitted by the laser emitting device passes through the through hole of the tungsten electrode clamp in the second chamber and the first hollow refractive lens in sequence and irradiates the welding area of the plate to be welded;

[0008] The third laser beam emitted by the laser emitting device or the ring laser diode built into 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.

[0009] Optionally, it further includes a second air inlet and a sixth chamber arranged between the fourth chamber and the fifth chamber, and the protective gas acts downward on the welding area of the plate to be welded through the second air inlet and the sixth chamber respectively.

[0010] Optionally, the inert gas is plasma gas, and the shielding gas is pure argon.

[0011] Optionally, it also includes a wire feeding roller, and the wire feeding roller and the hollow shaft motor both have forward and reverse rotation functions. When the hollow shaft motor rotates forward, the inert gas containing welding impurities flows back upward through the fourth chamber. When the hollow shaft motor reverses, the wind cleans the fourth chamber.

[0012] Optionally, an adjustment component is also included, wherein a motor collar is provided 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 the adjustment component. The adjustment component is used to adjust the position of the hollow tungsten pole and clean the hollow tungsten pole through the second laser beam.

[0013] Optionally, the adjustment assembly includes a ratchet ring connected to the ratchet ring, a ratchet shaft is provided at the center of the ratchet ring, and the ratchet ring includes pawls and elastic members arranged in a circular array, the tail end of the pawl is connected to the ratchet shaft through a hinge shaft, and the head end of the pawl is connected to the ratchet shaft through an elastic member, a reciprocating screw is connected to the bottom of the ratchet shaft, a slider is connected to the reciprocating screw, a transmission rod is connected to the lower end of the slider, and the other end of the transmission rod is connected to the tungsten electrode clamp.

[0014] Optionally, it further includes a first temperature sensor disposed below the second chamber, a second temperature sensor disposed below the third chamber, and a gas flow rate sensor disposed below the fourth chamber.

[0015] Optionally, the first hollow refractive lens plays a focusing role, 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.

[0016] Technical effects and advantages of the present invention:

[0017] 1. The present invention connects the first air inlet to the wire feed port, and the welding wire and the inert gas share the third chamber, which effectively saves the space of the composite welding torch and improves the integration of the composite welding torch.

[0018] 2. The present invention sets 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 an adjustment assembly is connected to the ratchet ring. With the cooperation of the pawl, elastic member, reciprocating screw, slider, transmission rod and other components in the adjustment assembly, the tungsten electrode clamp can be adjusted up and down, thereby achieving the up and down reciprocating adjustment of the hollow tungsten electrode, and then the energy of the second laser beam is used to effectively clean the impurities attached to the periphery of the output end of the hollow tungsten electrode in the second chamber of the composite welding torch.

[0019] 3. In the present invention, the welding wire and the inert gas are respectively fed through the wire feed port and the first air inlet in a spiral shape through the third chamber and sent downward to the top of the welding area of the plate to be welded, and an electromagnetic valve is provided at the input end of the first air inlet. The pulse adjustment of the electromagnetic valve can make the welding wire vibrate in the third chamber, thereby cleaning the impurities and attachments in the second chamber of the composite welding torch.

[0020] 4. The present invention uses the cooperation 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 air downward to clean the impurities attached to the fourth chamber of the composite welding torch.

[0021] 5. In the present invention, the welding wire is spirally located 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a laser-hollow tungsten arc coaxial composite welding torch structure according to an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of a laser-hollow tungsten arc coaxial composite welding torch structure according to an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the position of the adjustment component of the laser-hollow tungsten arc coaxial composite welding torch in the entire composite welding torch according to one embodiment of the present invention;

[0025] Figure 4 For the present invention Figure 3A schematic diagram of the enlarged structure of the middle part A;

[0026] Figure 5 This is a top view of the pawl wheel, ratchet ring and other components of the adjustment assembly of the present invention.

[0027] In the figure: 1. Laser emitting device; 2. Hollow fan; 3. Hollow shaft motor; 301. Motor shaft ring; 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. Ratchet; 9012. Elastic member; 902. Ratchet shaft; 903. Reciprocating screw; 904. Slider; 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 feed port; 24. Second air inlet; 25. Wire feed roller; 26. Plate to be welded. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein may be combined with each other.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from the description. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0030] See also Figure 1This embodiment discloses 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, and a first chamber 12 formed by the axial area 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 outward from the axis of the first chamber 12, wherein a 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, a tungsten electrode clamp 5 is installed at the upper part of the second chamber 13, and a first hollow refractive lens 6 is installed at the lower part, the tungsten electrode clamp 5 is provided with a through hole at the central axis position in the second chamber 13, and a second laser beam 11 emitted by the laser emitting device 1 passes through the through hole of the tungsten electrode clamp 5 and the first hollow refractive lens 6 in the second chamber 13 in sequence and irradiates the welding area of the plate 26 to be welded. A hollow shaft motor 3 is mounted above the hollow tungsten electrode 4. Inert gas flows downward through the third chamber 14 and acts on the welding area. A hollow shaft motor 3 is mounted above the hollow tungsten electrode 4, and the output shaft of the hollow shaft motor 3 is connected to 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 regions of the hollow fan 2 and the hollow shaft motor 3. The blades of the hollow fan 2 are located at the top of the fourth chamber 15. Under the upward suction of the hollow fan 2, which is 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 mounted below the fifth chamber 16. The third laser beam 20 emitted by the laser emitting 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 sheet material 26 to be welded.

[0031] Furthermore, the first air inlet 22 is connected to the wire feed port 23. The welding wire 18 and the inert gas are respectively fed through the wire feed port 23 and the first air inlet 22 in a spiral shape through the third chamber 14 and downwardly to the welding area above the plate 26 to be welded. Thus, by connecting the first air inlet 22 to the wire feed port 23, the welding wire 18 and the inert gas share the third chamber 14, effectively saving space in the composite welding torch and improving the integration of the composite welding torch. Furthermore, compared to the prior art, 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, which is more conducive to the melting of the welding wire 18 when it reaches the welding area.

[0032] Furthermore, in this embodiment, a solenoid valve is provided at the input end of the first air inlet 22, and the solenoid valve can adjust the air intake volume of the first air inlet 22. When the welding power is large, the controller of the welding equipment or the manual adjustment of the solenoid valve of the composite welding torch opens more, the air intake volume of the first air inlet 22 increases, and 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 the manual adjustment of the solenoid valve opens less to meet basic welding requirements and avoid waste of resources.

[0033] Furthermore, after regular use, it is inevitable that some impurities such as metal vapor, oxides, and plasma plumes will still adhere to the output ports of the second and third chambers 13, 14 of the composite welding torch after long-term operation, affecting welding efficiency and quality. In this case, the solenoid valve can be regularly pulsed open and closed based on the cumulative operating time of the load welding torch. The pulsed inert gas can cause the welding wire 18 to vibrate within the third chamber 14, thereby driving the chamber wall of the third chamber 14 to vibrate, further cleaning the impurities attached to the welding tips of the second and third chambers 13, 14 of the composite welding torch.

[0034] Please see the attached Figure 2 , in the attached Figure 1 In addition, the present invention further includes a second air inlet 24 and a sixth chamber 17 disposed between the fourth chamber 15 and the fifth chamber 16. The shielding 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. In this embodiment, the inert gas is plasma gas and the shielding gas is pure argon. In this way, dual gas protection of the composite welding torch is achieved during titanium alloy welding. The plasma arc formed by the plasma gas provides a stable high-temperature heat source, enabling the titanium alloy to melt rapidly and obtain good penetration depth and width. The shielding gas effectively isolates the air, preventing the titanium alloy from being oxidized, nitrided, and absorbing hydrogen at high temperatures, thereby reducing the occurrence of welding defects and improving the mechanical properties and corrosion resistance of the weld.

[0035] In addition, Figure 2 The third laser beam 20 emitted by 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.

[0036] Please see the attached Figure 1 -Attached Figure 3 The composite welding torch also includes a wire feeding roller 25. 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, the inert gas containing welding impurities flows back upward through the fourth chamber 15. When the hollow shaft motor 3 reverses, the wind cleans the fourth chamber 15.

[0037] In this embodiment, the vibration of the welding wire 18 in the third chamber 14 is caused by the pulse regulation of the solenoid valve, thereby achieving partial cleaning of the impurity attachments at the welding head ends of the second chamber 13 and the third chamber 14 in the composite welding torch. However, the vibration of the welding wire 18 due to the inert gas has limited cleaning effect on the impurity attachments at the welding head ends of the second chamber 13 and the third chamber 14. When the attached impurities are stubborn, the impurity attachments at the welding head ends of the second chamber 13 and the third chamber 14 cannot be cleaned thoroughly. Therefore, the composite welding torch provided in this embodiment further includes a wire feeding roller. 25. The wire feeding roller 25 has a forward and reverse rotation function and also includes a second temperature sensor arranged below the third chamber 14. When the composite welding torch works for a long time and the ambient temperature detected by the second temperature sensor is lower than the preset first threshold value, it means that the third chamber 14 is slightly covered with impurities. If it is not cleaned in time, the output of the wire feeding inert gas will be slightly affected. At this time, the controller of the welding equipment controls the solenoid valve to open to the maximum, and the inert gas is transmitted downward through the third chamber 14. The impurities below the third chamber are blown clean with a large flow rate through the large inert gas output. When the hybrid welding torch operates 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 lower portion of the third chamber is moderately covered with impurities. If not cleaned in time, the smoothness of wire feeding and the output of inert gas will be affected. At this time, the controller of the welding device controls the pulse opening and closing of the solenoid valve. The pulsed inert gas drives the welding wire 18 in the third chamber to vibrate, and the welding wire 18 performs pulse vibration cleaning on the impurities below the third chamber. When the hybrid welding torch operates 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 lower portion of the third chamber is partially covered with impurities. At this time, if not cleaned in time, it will affect wire feeding and the output of inert gas. At this time, the controller of the welding device controls the pulse opening and closing of the solenoid valve. The pulsed inert gas drives the welding wire 18 in the third chamber to vibrate laterally, achieving vibration cleaning of the impurities below the third chamber by the welding wire 18. At the same time, the controller of the welding device controls the wire feed roller 25 to frequently rotate forward and reverse, driving the welding wire 18 to perform reciprocating longitudinal collision cleaning on the impurities below the third chamber. In this way, high-intensity cleaning of the impurities below the third chamber 14 is achieved.

[0038] Furthermore, in this embodiment, the hollow shaft motor 3 also has forward and reverse rotation capabilities. When the hollow shaft motor 3 rotates forward, inert gas containing welding impurities flows upward through the fourth chamber 15. When the hollow shaft motor 3 rotates reversely, the airflow is directed downward, thereby cleaning the lower end of the fourth chamber 15. In this embodiment, the composite welding torch also includes a gas flow rate sensor disposed 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 the fourth chamber 15 is heavily contaminated with impurities. If not cleaned promptly, this will affect the removal of impurities such as oxide layers, dust, and other deposits from the sheet material 26 to be welded by the third laser beam 20, and will also affect the removal of the plasma plume generated by the plume effect in the weld zone. At this point, the welding equipment controller controls the hollow shaft motor 3 to reverse, causing the hollow fan 2 to blow air downward, thereby cleaning the fourth chamber 15 of the composite welding torch.

[0039] While the above-described embodiments clean impurities from the second, third, and fourth chambers 13, 14, and 15, the technical solutions and processes in these embodiments are unable to clean impurities from the surface of the hollow tungsten electrode 4. Impurities such as oxides and metal vapor deposits on the surface of the hollow tungsten electrode 4 can affect the temperature at the tungsten electrode output, resulting in insufficient power for the hybrid welding torch. Based on this, the present embodiment further incorporates the following improvements.

[0040] Please see 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 to a ratchet ring 302. The inner ring of the ratchet ring 302 is connected to the adjustment component 9. The adjustment component 9 is used to adjust the position of the hollow tungsten electrode 4 and clean the hollow tungsten electrode 4 through the second laser beam 11.

[0041] Specifically, the adjustment component 9 includes a ratchet wheel 901 connected to the ratchet ring 302, a ratchet shaft 902 is provided at the center of the ratchet wheel 901, and the ratchet wheel 901 includes a pawl 9011 and an elastic member 9012 arranged in a circular array, the tail end of the pawl 9011 is connected to the ratchet shaft 902 through a hinge shaft, and the head end of the pawl 9011 is connected to the ratchet shaft 902 through an elastic member 9012, a reciprocating screw 903 is connected to the bottom of 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.

[0042] In actual use, under normal circumstances, the hollow shaft motor 3 drives the hollow fan 2 to rotate forward and draw air upward. Impurities such as oxide layer, dust, attachments, etc. raised from the periphery of the welding area near the bottom of the fourth chamber 15 and plasma plume particles in the welding area enter the fourth chamber 15 and are drawn out through the blades of the hollow fan 2. When the hollow shaft motor 3 rotates forward, the ratchet ring 302 Figure 5 In the diagram, it rotates counterclockwise, and the ratchet ring 302 will not be engaged with any pawl 9011 of the ratchet wheel 901 in the adjustment component 9. After the ratchet of the ratchet ring 302 contacts the pawl 9011, the elastic member 9012 is in a compressed state, and the ratchet shaft 902 does not rotate.

[0043] When the composite welding 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 welding torch. At this time, the hollow shaft motor 3 is controlled to rotate in the reverse direction, and the ratchet ring 302 is in the Figure 5 In the diagram, it rotates clockwise, and the ratchet ring 302 and the pawl 9011 of the ratchet wheel 901 in the adjustment component 9 are engaged and transmitted. After the ratchet of the ratchet ring 302 contacts the pawl 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, and the slider 904 on the reciprocating screw 903 moves back and forth in the slideway of the reciprocating screw 903, driving the transmission rod 905 to move back and forth, and further driving the tungsten electrode clamp 5 and the hollow tungsten electrode 4 to move back and forth. At this time, the second laser beam 11 can act reciprocally on the lower end of the hollow tungsten electrode 4, and laser clean the impurities attached to the lower end of the hollow tungsten electrode 4, so as to clean the hollow tungsten electrode 4.

[0044] Furthermore, a first temperature sensor can be set below the second chamber 13. When the composite welding torch works for a long time and the ambient temperature detected by the first temperature sensor is lower than the preset threshold, it indicates that the end of the hollow tungsten pole 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 in the opposite direction, and realizes the up and down reciprocating movement of the tungsten pole clamp 5 and the hollow tungsten pole 4 through the adjustment component 9, and realizes laser cleaning of the lower end of the hollow tungsten pole 4 through the second laser beam 11.

[0045] Furthermore, the composite welding torch of this embodiment further includes an electrical interface 21 disposed outside the welding torch, and the electrical interface 21 is used to supply power to the hollow tungsten electrode 4 and the ring laser diode 19 .

[0046] Furthermore, the first hollow refractive lens 6 acts as a focusing lens, and after passing through the first hollow refractive lens 6, the second laser beam 11 is focused above the welding area of the sheet material 26 to be welded. The third laser beam 20 is circular, annular, arc-shaped, or cambered. When the third laser beam 20 operates in a circular shape, it can roughly clean the area around the weld area and roughly remove impurities such as the oxide layer and slag after welding. When the third laser beam 20 operates in an annular shape, it can more carefully clean the area around the weld area and thoroughly remove impurities such as the oxide layer and slag after welding.

[0047] 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, which effectively saves the space of the composite welding torch and improves the integration of the composite welding torch; by arranging a motor shaft ring at the output end of the hollow shaft motor, a ratchet ring is connected to the inner ring of the shaft ring, and the ratchet ring is connected to set an adjustment component, and with the cooperation of the pawl, elastic part, reciprocating screw, slider, transmission rod and other components in the adjustment component, the tungsten electrode clamp is adjusted up and down, and then the hollow tungsten electrode is adjusted up and down, and the energy of the second laser beam is used to effectively clean the impurities and attachments on the periphery of the hollow tungsten electrode output end in the second chamber of the composite welding torch; the welding wire and the inert gas are respectively passed through the wire feeding port and the first air inlet to form a It spirally passes through the third chamber and is sent downward to the top of the welding area of the plate to be welded, and an electromagnetic valve is provided at the input end of the first air inlet. The pulse adjustment of the electromagnetic valve can make the welding wire vibrate in the third chamber, thereby cleaning the impurity attachments in the second chamber of the composite welding torch; through the cooperation 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 air downward to clean the impurity attachments in the fourth chamber of the composite welding torch; in addition, in this embodiment, the welding wire is spirally located in the third chamber. Compared with the existing technology, 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.

[0048] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also 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 center area 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 outward 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 welding area above the plate (26) to be welded. An electromagnetic valve is provided at the input end of the first air inlet (22); The second laser beam (11) emitted by the laser emitting 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) to irradiate the welding area of the plate (26) to be welded; A hollow shaft motor (3) is provided on the upper portion 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); The invention also includes an adjusting component (9), wherein a motor collar (301) is provided at the output end of the hollow shaft motor (3), an inner ring of the collar is connected to a ratchet ring (302), and the ratchet ring (302) is connected to the adjusting component (9), and the adjusting 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).

2. 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; 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.

3. The high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding according to claim 2, characterized in that: The invention 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 to be welded (26) through the second air inlet (24) and the sixth chamber (17).

4. The high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding according to claim 3, characterized in that: The inert gas is plasma gas, and the protective gas is pure argon.

5. 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), and 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, the inert gas containing welding impurities flows back upward through the fourth chamber (15). When the hollow shaft motor (3) rotates reversely, the wind cleans the fourth chamber (15).

6. The high-power laser-hollow tungsten electrode composite welding torch for titanium alloy welding according to claim 1, characterized in that: The adjustment assembly (9) includes a ratchet wheel (901) connected to the ratchet ring (302), a ratchet shaft (902) is provided at the center of the ratchet wheel (901), and the ratchet wheel (901) includes ratchets (9011) and elastic members (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).

7. 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.

8. 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).

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