Laser welding device and method for special-shaped titanium alloy thin-wall part

Abstract

The invention relates to the technical field of welding devices, and discloses a laser welding device and method for a special-shaped titanium alloy thin-wall workpiece, the laser welding device for the special-shaped titanium alloy thin-wall workpiece comprises welding equipment and further comprises a mounting frame fixedly connected to the interior of the welding equipment, and a linear notch is perpendicular to a guide notch; the second guide rod is located above the supporting frame all the time, and when the first expansion piece pushes the second guide rod, the circular shaft is driven to move along the path of the first guide rod. The angle of the first guide rod is adjusted, then the second guide rod is pulled through the first expansion piece, then the circular shaft can move along the path of the guide notch, the circular shaft is used for welding the weld joint, automatic welding is achieved, the production efficiency can be improved, the welding quality is ensured, meanwhile, the efficient production speed can be achieved, and the production efficiency is improved. The welding quality and consistency are effectively guaranteed, the influence of human factors on the welding quality is reduced, and the cost is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of welding devices, and in particular to a laser welding device and method for special-shaped titanium alloy thin-walled parts. Background Art

[0002] Laser welding device is an advanced manufacturing equipment that uses high energy density laser beam to weld materials. Its working principle is to focus the laser on the joint of the workpiece, instantly melt and solidify to form a weld.

[0003] However, in the prior art, since many of the special-shaped titanium alloy thin-walled parts are conical, the welds often present an inclined angle, and are usually welded manually or by a robot arm. However, due to the thin wall thickness of the titanium alloy thin-walled parts, problems such as thermal deformation and excessive heat-affected zone are very likely to occur during welding. This requires uniform distribution of welding heat, otherwise it is easy to cause overheating or insufficient heat at the welding part, thereby affecting the strength and toughness of the welding position. However, it is difficult for manual operation to achieve such high precision requirements. Continuous and long-distance inclined welds will increase the labor intensity of the welder, resulting in poor welding continuity and easy injury to the welder. At the same time, the quality of the internal welds is poor. The quality is also difficult to guarantee, and defects such as incomplete penetration and porosity are prone to occur, that is, during the manual welding adjustment process, the company tries to use a robotic arm in conjunction with a platform for adjusting the direction for welding. However, although this solution can improve welding accuracy and efficiency, it is costly and has more stringent requirements on equipment. The introduction of a robotic arm requires a large amount of capital investment, and the maintenance and maintenance of the equipment also requires professionals. In addition, when targeting welds with different inclination angles, the use of a robotic arm in conjunction with adjusting the direction also requires programming and precise calibration, which will increase the preparation time and cost of welding, and seriously affect the progress and efficiency of welding production.

[0004] To this end, a laser welding device and method for special-shaped titanium alloy thin-walled parts are proposed, which can arbitrarily weld the welds of special-shaped titanium alloy thin-walled parts with different inclination angles. Summary of the invention

[0005] The object of the present invention is to provide a laser welding device and method for special-shaped titanium alloy thin-walled parts, so as to solve the problem that welds with inclined angles are difficult to weld.

[0006] On the one hand, the present invention proposes: a laser welding device for special-shaped titanium alloy thin-walled parts, including welding equipment, and also including a mounting frame fixedly connected to the inside of the welding equipment, a first guide rod rotatably connected to the outside of the mounting frame, a control shaft rotatably connected to the inside of the welding equipment, a circular shaft slidably connected to the inside of the first guide rod, a second guide rod arranged at the top of the welding equipment, a first telescope fixedly connected to the top of the welding equipment, a transmission belt sleeved between the control shaft and the mounting frame, a third telescope fixedly connected to the inside of the welding equipment, a support plate slidably connected to the inside of the welding equipment, a second telescope fixedly connected to the top of the support plate, a support frame fixedly connected to the output end of the second telescope, and a welder sleeved on the outside of the circular shaft, the second guide rod is fixedly connected to the output end of the first telescope, the circular shaft is located between the first guide rod and the first telescope, the first guide rod is located above the support plate, the support plate is located on one side of the first guide rod, the second guide rod is always located above the support frame, and when the first telescope pushes the second guide rod, the circular shaft is driven to move along the path of the first guide rod.

[0007] Furthermore, a guide slot is provided on the first guide rod, a linear slot is provided on the second guide rod, the bottom of the circular shaft is located inside the guide slot, the top of the circular shaft is located inside the linear slot, and when the first guide rod is in an initial state, the linear slot is perpendicular to the guide slot.

[0008] Furthermore, a guide rail is provided inside the welding equipment, the support plate is slidably connected to the outside of the guide rail, a slot is provided on the top of the welding equipment, an extension rod is provided at the output end of the first telescope, the extension rod is located inside the slot, and the extension rod is connected between the first telescope and the second guide rod.

[0009] Furthermore, the mounting frame includes a limiting sleeve fixedly connected to the inside of the welding equipment, and a connecting frame fixedly connected to one side of the limiting sleeve, and the bottom of the control shaft is rotatably connected to the inside of the connecting frame.

[0010] Furthermore, the control shaft includes a rotating sleeve rotatably connected to the inside of the connecting frame, a second transmission wheel fixedly connected to the outside of the rotating sleeve, a grip wheel fixedly connected to the top of the rotating sleeve, and an indicating ruler fixedly connected to the top of the grip wheel, and the outside of the grip wheel and the fixed screw are both provided with multiple rough circular strips.

[0011] Furthermore, a connecting sleeve is fixedly connected to the inside of the first guide rod, and the connecting sleeve is rotatably connected to the inside of the connecting frame. The outside of the connecting sleeve is fixedly connected to the first transmission wheel, and the transmission belt is sleeved between the first transmission wheel and the second transmission wheel. The transmission ratio of the first transmission wheel to the second transmission wheel is one to one.

[0012] Furthermore, a connecting rod frame is connected between the welder and the round shaft, the connecting rod frame is slidably connected to the outside of the round shaft, and screws are provided between the connecting rod frame and the round shaft.

[0013] Furthermore, a straight bar is arranged inside the welding equipment near the grip wheel, the straight bar passes through the grip wheel, a scale is arranged outside the straight bar, and the indicator ruler is fitted with the outside of the straight bar.

[0014] Furthermore, a fixing screw is threadedly connected at a position near the rotating sleeve inside the welding device, and one end of the fixing screw near the rotating sleeve is an inner arc surface, and the curvature of the inner arc surface is the same as the outer diameter of the rotating sleeve.

[0015] Another aspect of the present invention provides: Equipment inspection and maintenance: ensuring that the laser welding equipment, power supply, gas source, etc. are connected normally, and performing necessary preheating.

[0016] Focus position adjustment: according to the welding material and thickness, set the key parameters such as laser power, pulse width, repetition frequency, etc., install the mold above the support plate, adjust the rotation angle of the first guide rod, and then adjust the distance between the support plate and the circular axis to ensure that the laser focus is accurately aligned with the welding part.

[0017] Formal welding: Pull the second guide rod through the first telescopic device according to the set parameters, so that the round shaft is welded along the inclined path of the first guide rod. At the same time, closely observe the welding process to ensure the quality of the weld.

[0018] Cooling and inspection: After welding, natural or forced cooling is carried out, and the weld quality is checked using testing equipment.

[0019] Beneficial effects of the present invention:

[0020] 1. By adjusting the angle of the first guide rod and then pulling the second guide rod through the first telescopic device, the round shaft can be moved along the path of the guide groove, and the weld is welded by the round shaft to realize automatic welding, which can improve production efficiency and ensure welding quality. At the same time, it can achieve efficient production speed, effectively ensure welding quality and consistency, reduce the influence of human factors on welding quality, and effectively reduce costs.

[0021] 2. By rotating the first guide rod, the position of the round shaft and the welder can be controlled for welding, which can achieve a finer heat distribution, so that the round shaft can be controlled by a single second guide rod, thereby reducing the complexity of electronic and software control, the failure rate is usually low, and it has high wear resistance and fatigue resistance, ensuring the consistency of each product and improving product quality.

[0022] 3. The welding parts are fixed by support plates and support frames. This conventional installation method provides stable workpiece clamping and positioning. At the same time, the position of the first guide rod can be quickly adjusted by rotating the rotating sleeve, and the welding can be completed by starting the first telescopic device to pull the second guide rod to move back and forth. This reduces the skill requirements of the operator, reduces the complexity of learning, is easy to achieve standardized production, reduces the need for repeated learning, can quickly complete a large number of welding tasks, and greatly shortens the production cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of a three-dimensional structure of the present invention from a first viewing angle;

[0024] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the control shaft of the present invention;

[0026] Figure 4 For the present invention Figure 2 The enlarged schematic diagram of point A in the middle;

[0027] Figure 5 A top view of the present invention;

[0028] Figure 6 For the present invention Figure 5 The cross-sectional view at BB in FIG.

[0029] Figure 7 is a schematic structural diagram of a first guide rod of the present invention;

[0030] Figure 8 This is a state diagram of the first guide rod of the present invention when it rotates.

[0031] In the figure:

[0032] 1. Welding equipment; 101. Guide rail; 102. Strip notch; 103. Straight strip; 2. Mounting frame; 21. Limit sleeve; 22. Connecting frame; 3. First guide rod; 31. Guide notch; 311. Connecting sleeve; 312. First transmission wheel; 4. Control shaft; 41. Rotating sleeve; 42. Second transmission wheel; 43. Grip wheel; 44. Indicator ruler; 5. Round shaft; 6. Second guide rod; 61. Straight slot; 7. First telescope; 71. Extension rod; 8. Transmission belt; 9. Third telescope; 10. Support plate; 11. Second telescope; 12. Support frame; 13. Welding machine; 131. Connecting rod frame; 14. Fixing screw. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0034] Example 1, reference Figure 1-Figure 8 , which is the first embodiment of the present invention, provides a laser welding device for special-shaped titanium alloy thin-walled parts, including a welding device 1, and also includes a mounting frame 2 fixedly connected to the inside of the welding device 1, a first guide rod 3 rotatably connected to the outside of the mounting frame 2, a control shaft 4 rotatably connected to the inside of the welding device 1, a circular shaft 5 slidably connected to the inside of the first guide rod 3, a second guide rod 6 arranged at the top of the welding device 1, a first telescope 7 fixedly connected to the top of the welding device 1, a transmission belt 8 sleeved between the control shaft 4 and the mounting frame 2, a third telescope 9 fixedly connected to the inside of the welding device 1, a support plate 10 slidably connected to the inside of the welding device 1, a second telescope 11 fixedly connected to the top of the support plate 10, and a support frame 1 fixedly connected to the output end of the second telescope 11. 2, and a welder 13 sleeved on the outside of the circular shaft 5, the second guide rod 6 is fixedly connected to the output end of the first telescopic device 7, the circular shaft 5 is located between the first guide rod 3 and the first telescopic device 7, the first guide rod 3 is located above the support plate 10, the support plate 10 is located on one side of the first guide rod 3, the second guide rod 6 is always located above the support frame 12, when the first telescopic device 7 pushes the second guide rod 6, it drives the circular shaft 5 to move along the path of the first guide rod 3, which can achieve efficient production speed, quickly complete welding tasks, and improve production efficiency. At the same time, in repetitive work, it can effectively achieve accurate welding, ensure welding quality and consistency, and use the welding process is automated to further reduce the impact of human factors on welding quality, while also reducing safety risks in the welding process.

[0035] It is understandable that before processing, the customer will provide the weld requirements and conditions, namely the angle, width, depth, etc. of the weld, and then feel the inclination angle and width of the weld, according to the corresponding welding head, and then adjust the welding head posture and motion trajectory according to the provided data. In addition, for special-shaped titanium alloy thin-walled parts, specific molds need to be manufactured so that the special-shaped titanium alloy thin-walled parts have sufficient stability when they are fixed. The mold is installed above the support plate 10 and below the support frame 12.

[0036] Reference Figure 1-Figure 3 A guide slot 31 is formed on the first guide rod 3 , a linear slot 61 is formed on the second guide rod 6 , the bottom of the circular shaft 5 is located inside the guide slot 31 , and the top of the circular shaft 5 is located inside the linear slot 61 .

[0037] Specifically, the two ends of the circular shaft 5 are respectively located inside the guide slot 31 and the linear slot 61, so that the circular shaft 5 is restricted by two paths at the same time, and the second guide rod 6 can only perform a single reciprocating translation, while the first guide rod 3 can only rotate. Then, when adjusting according to the weld angle, it is sufficient to rotate the first guide rod 3, and the circular shaft 5 will not rotate with the first guide rod 3. The circular shaft 5 will be squeezed by the first guide rod 3 when it rotates, and at this time the circular shaft 5 will translate inside the linear slot 61.

[0038] Reference Figure 1-Figure 7 A guide rail 101 is arranged inside the welding equipment 1, and the support plate 10 is slidably connected to the outside of the guide rail 101. A slot 102 is opened on the top of the welding equipment 1, and an extension rod 71 is arranged at the output end of the first telescope 7. The extension rod 71 is located inside the slot 102, and the extension rod 71 is connected between the first telescope 7 and the second guide rod 6.

[0039] Specifically, the support plate 10 is supported by the guide rail 101, and the first telescope 7 is fixedly arranged on the top of the welding equipment 1. The first telescope 7 is telescopically extended to drive the extension rod 71 to move back and forth, and the extension rod 71 will move inside the strip groove 102, thereby enabling the second guide rod 6 to move back and forth, and the second guide rod 6 drives the circular shaft 5 connected thereto to move synchronously.

[0040] Reference Figure 2-Figure 5 The mounting frame 2 includes a limiting sleeve 21 fixedly connected to the inside of the welding equipment 1, and a connecting frame 22 fixedly connected to one side of the limiting sleeve 21. The bottom of the control shaft 4 is rotatably connected to the inside of the connecting frame 22. The connecting frame 22 is used to further stabilize the control shaft 4 to ensure that the control shaft 4 will not deviate.

[0041] Reference Figure 2-Figure 6 The first guide rod 3 is fixedly connected to a connecting sleeve 311 inside, and the connecting sleeve 311 is rotatably connected to the inside of the connecting frame 22. The first guide rod 3 can only rotate with the connecting sleeve 311 as the fulcrum and the center of the circle. The connecting sleeve 311 is fixedly connected to a first transmission wheel 312 outside, and the transmission belt 8 is sleeved between the first transmission wheel 312 and the second transmission wheel 42, so that the two can rotate synchronously.

[0042] Reference Figure 2-Figure 6The control shaft 4 includes a rotating sleeve 41 rotatably connected to the inside of the connecting frame 22, a second transmission wheel 42 fixedly connected to the outside of the rotating sleeve 41, a grip wheel 43 fixedly connected to the top of the rotating sleeve 41, and an indicator ruler 44 fixedly connected to the top of the grip wheel 43. The transmission ratio of the first transmission wheel 312 and the second transmission wheel 42 is one to one. When the grip wheel 43 rotates to drive the second transmission wheel 42 to rotate, the transmission belt 8 will synchronously drive the first transmission wheel 312 to rotate. The first transmission wheel 312 and the second transmission wheel 42 have the same rotation angle, so it is easier to control the rotation angle of the first guide rod 3. The grip wheel 43 and the fixed screw 14 are both provided with a plurality of rough circular strips on the outside, making it easier to control the grip wheel 43 and the fixed screw 14, ensuring the strength and toughness of the welding part, and improving the production efficiency and welding quality. When the first guide rod 3 is in the initial state, the straight slot 61 is perpendicular to the guide slot 31.

[0043] Reference Figure 1-Figure 8 A connecting rod frame 131 is connected between the welder 13 and the circular shaft 5, and the connecting rod frame 131 is slidably connected to the outside of the circular shaft 5. A screw is arranged between the connecting rod frame 131 and the circular shaft 5. A fixing screw 14 is threadedly connected to a position near the rotating sleeve 41 inside the welding equipment 1. The fixing screw 14 can be translated by rotating the fixing screw 14. By rotating the fixing screw 14, the fixing screw 14 is fit with the rotating sleeve 41, and the rotating sleeve 41 will be fixed by the fixing screw 14. The end of the fixing screw 14 close to the rotating sleeve 41 is an inner arc surface, and the curvature of the inner arc surface is the same as the outer diameter of the rotating sleeve 41, so as to ensure that the fixing screw 14 is more fit to the rotating sleeve 41, and then when the fixing screw 14 is used to fix the rotating sleeve 41, the rotating sleeve 41 can be fixed more effectively, so that the first guide rod 3 cannot move.

[0044] Reference Figure 1-Figure 8 A straight bar 103 is provided inside the welding device 1 near the grip wheel 43. The straight bar 103 passes through the grip wheel 43. A scale is provided on the outside of the straight bar 103. The indicator ruler 44 is fitted with the outside of the straight bar 103. By observing the fitting between the indicator ruler 44 and the straight bar 103, the rotation angle of the grip wheel 43 can be known.

[0045] The working principle of the present invention is as follows: the mold is installed above the support plate 10 and below the support frame 12, and then the special-shaped titanium alloy thin-walled part is placed on the mold on the top of the support plate 10, and then the second telescopic device 11 is contracted to drive the support frame 12 and the mold outside the support frame 12 to move downward, so as to fix the special-shaped titanium alloy thin-walled part, and according to the inclination angle of the conical structure, the fixing screw 14 is rotated to release the fixation of the rotating sleeve 41, and then the indicator ruler 44 is rotated to drive the rotating sleeve 41, the second transmission wheel 42 and the indicator ruler 44 to rotate synchronously, and when the second transmission wheel 42 rotates, the first transmission wheel 312 is driven by the transmission belt 8 to rotate. The first transmission wheel 312 makes the connecting sleeve 311 rotate synchronously inside the limiting sleeve 21, and the connecting sleeve 311 drives the first guide rod 3 to rotate accordingly. According to the angle where the indicator ruler 44 and the straight bar 103 are in contact with each other, the rotation angle of the grip wheel 43 is known, and then the rotation angle of the first guide rod 3 is controlled. When the first guide rod 3 rotates, since the round shaft 5 is located inside the linear notch 61 and the guide notch 31, the round shaft 5 is squeezed by the rotation of the first guide rod 3, so that the round shaft 5 inside the first guide rod 3 automatically moves inside the linear notch 61 and the guide notch 31, that is, the first guide rod 3 will rotate with the connecting sleeve 311. 11 is the fulcrum center for rotation, so that the inclination angle of the first guide rod 3 is the same as the inclination of the welding seam, and then the fixing screw 14 is rotated to fix the rotating sleeve 41 through the fixing screw 14, so that the control shaft 4 cannot rotate as a whole, and then the first guide rod 3 is locked, and the third telescopic device 9 is used to push the support plate 10, so that the titanium alloy thin-walled part moves to a position close to the welder 13, and then after reaching the appropriate position, the screw between the connecting rod frame 131 and the round shaft 5 is rotated, and the connecting rod frame 131 is pulled, so that the welder 13 and the connecting rod frame 131 reach the weld, so that the welder 13 fits the weld, and then The screws are fixed so that the connecting rod frame 131 cannot move. At this time, the extension rod 71 is pushed to move by the first telescopic device 7, so that the extension rod 71 drives the second guide rod 6 to translate. At this time, the second guide rod 6 will drive the round shaft 5 to move synchronously, and the welder 13 is located outside the round shaft 5. When the round shaft 5 moves, the bottom will be restricted by the first guide rod 3, so that the bottom of the round shaft 5 slides inside the guide groove 31, and the top of the round shaft 5 will slide inside the straight groove 61 under the influence of the guide groove 31 while the second guide rod 6 translates. In this way, welds with any inclination angle can be welded.

[0046] Example 2, reference Figure 1-Figure 8 , as a second embodiment of the present invention, provides: a method for using a laser welding device for special-shaped titanium alloy thin-walled parts, comprising the following steps:

[0047] Equipment inspection and maintenance: Ensure that the laser welding equipment, power supply, gas source, etc. are connected normally, and perform necessary preheating.

[0048] Focus position adjustment: according to the welding material and thickness, set the key parameters such as laser power, pulse width, repetition frequency, etc., install the mold above the support plate 10, adjust the rotation angle of the first guide rod 3, and then adjust the distance between the support plate 10 and the circular axis 5 to ensure that the laser focus is accurately aligned with the welding part.

[0049] Formal welding: according to the set parameters, the second guide rod 6 is pulled through the first telescopic device 7, so that the round shaft 5 is welded along the inclined path of the first guide rod 3, and the welding process is closely observed to ensure the quality of the weld.

[0050] Cooling and inspection: After welding, natural or forced cooling is carried out, and the weld quality is checked using testing equipment.

Claims

1. A laser welding device for special-shaped titanium alloy thin-walled parts, comprising a welding device (1), characterized in that: The welding device (1) further comprises a mounting frame (2) fixedly connected to the inside of the welding device (1), a first guide rod (3) rotatably connected to the outside of the mounting frame (2), a control shaft (4) rotatably connected to the inside of the welding device (1), a round shaft (5) slidably connected to the inside of the first guide rod (3), a second guide rod (6) arranged at the top of the welding device (1), a first telescopic device (7) fixedly connected to the top of the welding device (1), a transmission belt (8) sleeved between the control shaft (4) and the mounting frame (2), a third telescopic device (9) fixedly connected to the inside of the welding device (1), a support plate (10) slidably connected to the inside of the welding device (1), and a third telescopic device (9) fixedly connected to the top of the support plate (10). The invention relates to a second telescopic device (11), a support frame (12) fixedly connected to the output end of the second telescopic device (11), and a welder (13) sleeved on the outside of the circular shaft (5); the second guide rod (6) is fixedly connected to the output end of the first telescopic device (7); the circular shaft (5) is located between the first guide rod (3) and the first telescopic device (7); the first guide rod (3) is located above the support plate (10); the support plate (10) is located on one side of the first guide rod (3); the second guide rod (6) is always located above the support frame (12); when the first telescopic device (7) pushes the second guide rod (6), the circular shaft (5) is driven to move along the path of the first guide rod (3).

2. The laser welding device for special-shaped titanium alloy thin-walled parts according to claim 1 is characterized in that: The first guide rod (3) is provided with a guide slot (31), the second guide rod (6) is provided with a linear slot (61), the bottom of the circular shaft (5) is located inside the guide slot (31), the top of the circular shaft (5) is located inside the linear slot (61), and when the first guide rod (3) is in an initial state, the linear slot (61) is perpendicular to the guide slot (31).

3. The laser welding device for special-shaped titanium alloy thin-walled parts according to claim 2 is characterized in that: A guide rail (101) is arranged inside the welding device (1), the support plate (10) is slidably connected to the outside of the guide rail (101), a slot (102) is opened on the top of the welding device (1), an extension rod (71) is arranged at the output end of the first telescopic device (7), the extension rod (71) is located inside the slot (102), and the extension rod (71) is connected between the first telescopic device (7) and the second guide rod (6).

4. The laser welding device for special-shaped titanium alloy thin-walled parts according to claim 2 is characterized in that: The mounting frame (2) comprises a limiting sleeve (21) fixedly connected to the inside of the welding device (1), and a connecting frame (22) fixedly connected to one side of the limiting sleeve (21), and the bottom of the control shaft (4) is rotatably connected to the inside of the connecting frame (22).

5. The laser welding device for special-shaped titanium alloy thin-walled parts according to claim 4 is characterized in that: The control shaft (4) comprises a rotating sleeve (41) rotatably connected to the inside of the connecting frame (22), a second transmission wheel (42) fixedly connected to the outside of the rotating sleeve (41), a grip wheel (43) fixedly connected to the top of the rotating sleeve (41), and an indicator ruler (44) fixedly connected to the top of the grip wheel (43), and the outside of the grip wheel (43) and the fixed screw rod (14) are both provided with a plurality of rough circular strips.

6. The laser welding device for special-shaped titanium alloy thin-walled parts according to claim 5, characterized in that: A connecting sleeve (311) is fixedly connected to the interior of the first guide rod (3), and the connecting sleeve (311) is rotatably connected to the interior of the connecting frame (22). A first transmission wheel (312) is fixedly connected to the exterior of the connecting sleeve (311), and the transmission belt (8) is sleeved between the first transmission wheel (312) and the second transmission wheel (42), and the transmission ratio between the first transmission wheel (312) and the second transmission wheel (42) is one to one.

7. The laser welding device for special-shaped titanium alloy thin-walled parts according to claim 5, characterized in that: A connecting rod frame (131) is connected between the welder (13) and the round shaft (5); the connecting rod frame (131) is slidably connected to the outside of the round shaft (5); and screws are provided between the connecting rod frame (131) and the round shaft (5).

8. The laser welding device for special-shaped titanium alloy thin-walled parts according to claim 5, characterized in that: A straight bar (103) is arranged inside the welding device (1) near the grip wheel (43), the straight bar (103) passes through the grip wheel (43), a scale is arranged outside the straight bar (103), and the indicator ruler (44) is in contact with the outside of the straight bar (103).

9. The laser welding device for special-shaped titanium alloy thin-walled parts according to claim 6, characterized in that: A fixing screw (14) is threadedly connected to a position near the rotating sleeve (41) inside the welding device (1); one end of the fixing screw (14) near the rotating sleeve (41) is an inner arc surface; the curvature of the inner arc surface is the same as the outer diameter of the rotating sleeve (41).

10. A method for using a laser welding device for special-shaped titanium alloy thin-walled parts, using the laser welding device for special-shaped titanium alloy thin-walled parts according to claim 2, characterized in that: The following steps are involved: Equipment inspection and maintenance: Ensure that the laser welding equipment, power supply, gas source, etc. are connected normally, and perform necessary preheating; Focus position adjustment: according to the welding material and thickness, key parameters such as laser power, pulse width, repetition frequency, etc. are set, and the mold is installed above the support plate (10), and the rotation angle of the first guide rod (3) is adjusted, and then the distance between the support plate (10) and the circular axis (5) is adjusted to ensure that the laser focus is accurately aligned with the welding part; Formal welding: according to the set parameters, the second guide rod (6) is pulled through the first telescopic device (7) so that the round shaft (5) is welded along the inclined path of the first guide rod (3), and the welding process is closely observed to ensure the quality of the weld; Cooling and inspection: After welding, natural or forced cooling is carried out, and the weld quality is checked using testing equipment.

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