Laser welding device and method for special-shaped titanium alloy thin-walled parts

Abstract

The present application relates to the field of welding technology, and in particular to a laser welding device and method for special-shaped titanium alloy thin-walled parts, wherein the device includes a fixing assembly and a welding gun; the fixing assembly is slidably arranged along the length direction of the support frame, and the welding gun is slidably arranged along the width direction of the support frame; the fixing assembly includes an upper clamping plate and a lower clamping plate, and both the upper clamping plate and the lower clamping plate are elastically provided with abutment joints for abutting the workpiece to be welded. Compared with the traditional method of fixing special-shaped parts by using special support blocks and pressure blocks, the present application realizes adaptive abutment of special-shaped thin-walled workpieces by elastically setting abutment joints on the upper clamping plate and the lower clamping plate, so that when facing a workpiece with an irregular external structure, the abutment joint can adaptively abut the external contour of the workpiece, thereby fixing the workpiece; in addition, it can also reduce the frequent special-specification of support blocks and pressure blocks, thereby reducing certain production costs.

Description

Technical Field

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

[0002] Laser welding has the advantages of high energy density, fast welding speed, small heat-affected zone, precise and fast controllability, etc. It is widely used in aircraft carriers or aerospace products with strict requirements on welding quality, such as welding of titanium alloy thin-walled parts.

[0003] Due to the complex structure of aircraft carriers or aerospace products, their components often have different external morphological structures due to different installation locations and requirements. They are usually called special-shaped parts. For example, in the patent document with publication number CN116275517A, a laser welding device and method for complex-shaped titanium alloy thin-walled parts are disclosed. In order to accurately ensure the welding effect, support blocks and pressure blocks that fit the titanium alloy thin-walled parts are specially provided, which has certain positive significance. However, in the actual process, there are often certain differences in the external contours of the products to be welded. If corresponding support blocks and pressure blocks are made for any product to be welded, it will bring great economic costs.

[0004] Therefore, it is very necessary to seek a welding device that can adapt to a variety of different parts to be welded. Summary of the invention

[0005] The purpose of the present application is to provide a laser welding device and method for special-shaped titanium alloy thin-walled parts in order to solve the above-mentioned problems.

[0006] To achieve the above purpose, the technical solution of this application is:

[0007] In the first aspect, a laser welding device for special-shaped titanium alloy thin-walled parts is provided, including a fixing assembly and a welding gun; the fixing assembly is slidably arranged along the length direction of a support frame, and the welding gun is slidably arranged along the width direction of the support frame; the fixing assembly includes an upper clamping plate and a lower clamping plate, and both the upper clamping plate and the lower clamping plate are elastically provided with abutment joints for abutting the workpiece to be welded, and the number of abutment joints is provided in plurality; a first sliding rod is slidably arranged on the upper clamping plate, and a first stop handle is provided at one end of the first sliding rod located on the upper side of the upper clamping plate; a second sliding rod is slidably arranged on the lower clamping plate, and a second stop handle is provided at one end of the second sliding rod located on the lower side of the lower clamping plate; the abutment joints are correspondingly arranged at the lower end of the first sliding rod and the upper end of the second sliding rod; a section of the first sliding rod located on the lower side of the upper clamping plate is sleeved with a first spring, and a section of the second sliding rod located on the upper side of the lower clamping plate is sleeved with a second spring.

[0008] Preferably, at least two groups of the fixing components are provided, and the two groups of the fixing components are respectively located on both sides of the welding gun along the length direction of the support frame.

[0009] Preferably, the number of the fixing assemblies is four, two of which are located on one side of the welding gun, and the other two are located on the other side of the welding gun.

[0010] Preferably, a push rod is provided on the upper clamping plate and / or the lower clamping plate, and a push plate is provided on one end of the push rod which is rotated toward a position between the upper clamping plate and the lower clamping plate.

[0011] Preferably, the support frame is provided with a slide rail, the slide rail is provided with a slider, the bottom of the lower clamping plate is provided with a sliding column, the slider is provided with a sliding sleeve, and the sliding column and the sliding sleeve are slidably matched; a stud is fixedly provided on the slider, the top of the stud slides through the lower clamping plate, an adjusting nut is screwed on the stud, and the adjusting nut abuts the bottom wall of the lower clamping plate.

[0012] Preferably, a fixed frame is provided on the support frame, a first sliding frame is slidably provided on the fixed frame, the first sliding frame includes a first connecting plate, a first sliding shaft is slidably provided on the first connecting plate, a first limiting plate is provided on the top of the first sliding shaft, a second limiting plate is provided on the bottom of the first sliding shaft, and a third spring is provided between the second limiting plate and the first connecting plate.

[0013] Preferably, it also includes a movable frame, on which a second sliding frame is slidably provided, the second sliding frame, the top of the second sliding shaft is provided with a third limit plate, the bottom of the second sliding shaft is provided with a fourth limit plate, and the second sliding shaft is sleeved with a fourth spring; an adjusting stud is provided at the bottom of the fourth limit plate, an adjusting plate is slidably provided on the adjusting stud, and a guide column is slidably provided on the adjusting plate.

[0014] Preferably, the guide column comprises a rotation-stopping section, and the rotation-stopping section is slidably matched with the adjustment plate.

[0015] On the second aspect, the present application also provides a laser welding method for special-shaped titanium alloy thin-walled parts, using the welding device as described above, including: 1. Separating the upper clamping plate and the lower clamping plate in the fixing assembly located on one side of the welding gun, and placing one of the workpieces to be welded on the abutment joint located on the lower clamping plate; 2. Then closing the upper clamping plate and the lower clamping plate, and fixing them with bolts; 3. Correspondingly, setting another workpiece to be welded in the fixing assembly on the other side of the welding gun, and ensuring that the relative positions of the two workpieces along the width direction of the support frame are consistent; 4. Then respectively adjusting the fixing assemblies on both sides of the welding gun so that the opposite ends of the two workpieces to be welded are butt-jointed with each other; 5. Then controlling the welding gun to weld the two workpieces to be welded.

[0016] The present application discloses a laser welding device and method for special-shaped titanium alloy thin-walled parts. Compared with the traditional method of fixing special-shaped parts by using special support blocks and pressure blocks, the present application realizes adaptive abutment of special-shaped thin-walled workpieces by elastically arranging abutment joints on the upper clamping plate and the lower clamping plate. Therefore, when facing a workpiece with an irregular external structure, the abutment joint can adaptively abut the external contour of the workpiece to achieve fixation of the workpiece; in addition, it can also reduce the frequent special specifications of support blocks and pressure blocks, thereby reducing a certain production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of this application;

[0018] Figure 2 for Figure 1 A partial enlarged schematic diagram in the middle;

[0019] Figure 3 for Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0020] Figure 4 for Figure 1 A partial enlarged schematic diagram of point C in the middle;

[0021] Figure 5 This is a schematic diagram of the overall structure of this application from another angle;

[0022] Figure 6 This is a partial enlarged schematic diagram of the bottom of the lower splint in this application;

[0023] Figure 7 This is a partial enlarged schematic diagram of the rotating plate in this application;

[0024] Figure 8 It is a partial enlarged schematic diagram of the second sliding frame in this application;

[0025] Fig. 9 This is a partial enlarged schematic diagram of the connection between the movable frame and the supporting frame in this application.

[0026] In the figure:

[0027] 1. Upper clamping plate; 10. First sliding rod; 11. First spring; 12. First stop handle; 2. Lower clamping plate; 20. Second spring; 21. Second sliding rod; 22. Second stop handle; 23. Adjusting nut; 24. Stud; 25. Sliding sleeve; 26. Sliding column; 27. Push rod; 28. Top plate; 3. Support frame; 30. Slide rail; 31. Sliding block; 4. Fixed frame; 40. First sliding frame; 41. First connecting plate; 42. First stop plate; 43. Sliding arm; 44. First sliding Axis; 45, second limit plate; 46, third spring; 47, welding gun; 5, movable frame; 50, second sliding frame; 500, second connecting plate; 51, second sliding shaft; 52, fourth spring; 53, third limit plate; 54, sliding cavity; 55, fourth limit plate; 56, adjustment plate; 560, adjustment slot; 57, adjustment stud; 570, first nut; 58, guide column; 580, second nut; 581, guide rod; 6, abutment; 7, workpiece; 8, tightening knob. DETAILED DESCRIPTION

[0028] The present application is now described in further detail in conjunction with the accompanying drawings. The accompanying drawings are simplified schematic diagrams, which only illustrate the basic structure of the present application in a schematic manner, and therefore only show the components related to the present application.

[0029] like Figure 1-9 As shown, in the first aspect, a laser welding device for special-shaped titanium alloy thin-walled parts is provided, including a fixing assembly and a welding gun 47; the fixing assembly is slidably arranged along the length direction of the support frame 3, and the welding gun 47 is slidably arranged along the width direction of the support frame 3; the fixing assembly includes an upper clamping plate 1 and a lower clamping plate 2, and both the upper clamping plate 1 and the lower clamping plate 2 are elastically provided with abutment joints 6 for abutting against a workpiece 7 to be welded.

[0030] The support frame 3 is used to provide support for the entire welding device and is a frame structure as a whole; the support frame 3 has a certain length and width. Specifically, for the convenience of explanation and understanding, its length direction is defined as the left-right direction, and its width direction is defined as the front-back direction in this embodiment.

[0031] The function of the fixing component is to fix the special-shaped parts to be welded. The reason why it can move on the support frame 3 is that it needs to be adjusted left and right according to the appearance size of the workpiece 7 to be welded. It is also convenient for adjusting the position of the two workpieces 7 that need to be welded together to facilitate docking.

[0032] The abutment joint 6 is a component that directly contacts the workpiece 7 to be welded in actual situations. For the abutment joint 6 on the upper clamping plate 1, it is located below the upper clamping plate 1, that is, located inside the upper clamping plate 1 and the lower clamping plate 2 after they are closed. For the abutment joint 6 on the lower clamping plate 2, it is located above the lower clamping plate 2, and also located inside the upper clamping plate 1 and the lower clamping plate 2 after they are closed. Therefore, under the elastic action of the abutment joint 6 in the upper and lower directions can adaptively fix the workpiece 7 to be welded.

[0033] It should be noted that there are multiple abutment joints 6, which are densely arranged so that the force exerted by the abutment joints 6 on the workpiece 7 to be welded is more widely distributed, thereby forming an abutment effect similar to that of a plate-like structure, further ensuring the stability of the workpiece 7 to be welded.

[0034] In addition, the abutment of each abutment joint 6 with the workpiece 7 to be welded does not affect each other, so that special-shaped structures such as grooves, protrusions, etc. on the workpiece 7 to be welded can be effectively abutted and fixed.

[0035] The welding method in this embodiment can be laser welding, and the corresponding welding gun 47 is a laser welding gun. During laser welding, the welding wire and the weld are irradiated by the laser beam, so that the welding wire and the weld of the workpiece to be welded are integrated, thereby welding the two workpieces to be welded into one. Compared with the traditional welding method, the laser welding method used in this embodiment has better welding accuracy, the light spot generated by welding is smaller and the positioning is more accurate; in addition, the welding gun 47 can be moved, which can ensure the welding speed of the workpiece to be welded, thereby completing a large number of welding tasks in a short time and improving production efficiency.

[0036] At the same time, the laser welding method used in this embodiment produces a smaller heating area and a smaller penetration depth, so the welding process has little impact on the welded parts, that is, the deformation is small. Especially for special-shaped thin-walled workpieces, the use of laser welding can better reduce the additional impact on the welded workpieces during the welding process and further ensure the quality of welding.

[0037] For titanium alloys with higher requirements in industry applications, laser welding can better meet the welding requirements between titanium alloys, thereby further meeting the strict use requirements of titanium alloys in aerospace applications.

[0038] Compared with the traditional method of fixing special-shaped parts by using specially made support blocks and pressure blocks, the present application realizes adaptive abutment of special-shaped thin-walled workpieces 7 by elastically arranging abutment joints 6 on the upper clamping plate 1 and the lower clamping plate 2. Therefore, when facing a workpiece 7 with an irregular external structure, the abutment joint 6 can adaptively abut the external contour of the workpiece 7, thereby fixing the workpiece 7; in addition, it can also reduce the frequent special specifications of support blocks and pressure blocks, thereby reducing a certain production cost.

[0039] In some further embodiments, at least two groups of fixing components are provided, and the two groups of fixing components are respectively located on both sides of the welding gun 47 along the length direction of the support frame 3 .

[0040] The two sets of fixing components are respectively used to fix two workpieces 7 to be welded.

[0041] In some further embodiments, the number of the fixing assemblies is four, two of which are located on one side of the welding gun 47 , and the other two are located on the other side of the welding gun 47 .

[0042] For one of the workpieces 7 to be welded, the two sets of fixing components can better ensure the stability of the workpiece 7 to be welded.

[0043] In some further embodiments, a first sliding rod 10 is slidably provided on the upper clamp plate 1, and two ends of the first sliding rod 10 are respectively located on both sides of the upper clamp plate 1, and a first stop handle 12 is provided at one end of the first sliding rod 10 located on the upper side of the upper clamp plate 1; a second sliding rod 21 is slidably provided on the lower clamp plate 2, and two ends of the second sliding rod 21 are respectively located on both sides of the lower clamp plate 2, and a second stop handle 22 is provided at one end of the second sliding rod 21 located on the lower side of the lower clamp plate 2; the abutment 6 is correspondingly arranged at the lower end of the first sliding rod 10 and the upper end of the second sliding rod 21; a section of the first sliding rod 10 located on the lower side of the upper clamp plate 1 is sleeved with a first spring 11, and a section of the second sliding rod 21 located on the upper side of the lower clamp plate 2 is sleeved with a second spring 20.

[0044] The first stop handle 12 and the second stop handle 22 can be fixed to the first sliding rod 10 and the second sliding rod 21 respectively by screws.

[0045] When the abutment head 6 contacts the workpiece 7 to be welded, as the upper clamping plate 1 and the lower clamping plate 2 continue to approach each other, the first spring 11 and the second spring 20 are adaptively compressed, and the abutment head 6 gradually presses against the workpiece 7 to be welded under the elastic potential energy of the first spring 11 and the second spring 20, thereby achieving a tight fixation of the workpiece 7 to be welded.

[0046] In some further embodiments, a push rod 27 is provided on the upper clamping plate 1 and / or the lower clamping plate 2 , and a push plate 28 is provided at one end of the push rod 27 which is rotated toward a position between the upper clamping plate 1 and the lower clamping plate 2 .

[0047] In order to ensure the stability of the workpiece 7 to be welded after being fixed, a push rod 27 is provided on the upper clamping plate 1. A top plate 28 is rotatably provided at one end of the push rod 27 away from the upper clamping plate 1. The top plate 28 preferably has a narrower width to be able to adapt to the groove in the workpiece 7 to be welded. When the groove is wider, the top plate 28 can be rotated so that the front-to-back distance between the two ends of the top plate 28 becomes larger and larger, thereby adapting to grooves of different widths and increasing adaptability.

[0048] In other embodiments, the push rod 27 may also be disposed on the lower clamping plate 2 , or the push rod 27 may be disposed on both the upper clamping plate 1 and the lower clamping plate 2 .

[0049] It should be noted that since the upper clamping plate 1 and the lower clamping plate 2 are fixed together by bolts, when both the upper clamping plate 1 and the lower clamping plate 2 are provided with a push rod 27, for workpieces 7 to be welded of different thicknesses, adaptation can be achieved by adjusting the degree of closing between the upper clamping plate 1 and the lower clamping plate 2.

[0050] In some further embodiments, a slide rail 30 is provided on the support frame 3, a slider 31 is provided on the slide rail 30, a sliding column 26 is provided at the bottom of the lower clamp plate 2, a sliding sleeve 25 is provided on the slider 31, and the sliding column 26 and the sliding sleeve 25 are slidably matched; a stud 24 is fixedly provided on the slider 31, the top of the stud 24 slides through the lower clamp plate 2, an adjusting nut 23 is screwed on the stud 24, and the adjusting nut 23 abuts against the bottom wall of the lower clamp plate 2.

[0051] The fixed component can be moved left and right on the support frame 3 by means of a screw slide rail, such as by setting a connecting block that cooperates with the screw thread on the left side or right side wall of the bottom of the lower clamping plate 2. The structure of the screw slide rail is relatively common in the industry and is a prior art. Therefore, its structure and principle will not be repeated in this embodiment.

[0052] In order to ensure that the heights of the two fixing assemblies located on the same side of the welding gun 47 are consistent (to ensure the levelness of the workpiece 7 to be welded), the heights of the fixing assemblies can be adjusted.

[0053] Specifically, when the adjusting nut 23 is adjusted upward, the upper clamping plate 1 will rise synchronously, and vice versa.

[0054] In some further embodiments, a fixed frame 4 is provided on the support frame 3, and a first sliding frame 40 is slidably provided on the fixed frame 4 along the width direction of the support frame 3. The first sliding frame 40 includes a first connecting plate 41, and a first sliding shaft 44 is slidably provided on the first connecting plate 41. The two ends of the first sliding shaft 44 are respectively located on the upper and lower sides of the first connecting plate 41, and a first limiting plate 42 is provided on the top of the first sliding shaft 44. A second limiting plate 45 is provided at the bottom of the first sliding shaft 44. A third spring 46 is provided between the second limiting plate 45 and the first connecting plate 41. The third spring 46 is sleeved on the first sliding shaft 44, and a welding gun 47 is arranged at the bottom of the second limiting plate 45.

[0055] The first sliding frame 40 is slidably arranged on the top of the fixed frame 4 through a track. The number of the first sliding shafts 44 is two, and the two first sliding shafts 44 are arranged at intervals in front and back.

[0056] The welding gun 47 is connected to the second limiting plate 45 through a fixing column, the top of the fixing column is connected to the second limiting plate 45, and the bottom of the fixing column is hinged to the welding gun 47 through bolts, so as to adjust the angle of the welding gun 47.

[0057] Under the action of the third spring 46 , the welding gun 47 can always adaptively abut against the welding area.

[0058] The movement of the first sliding frame 40 along the front-rear direction of the fixed frame 4 can also be achieved by a screw slide rail mechanism.

[0059] In some further embodiments, a movable frame 5 is further included, on which a second sliding frame 50 is slidably provided along the width direction of the support frame 3, the second sliding frame 50 includes a second connecting plate 500, on which a second sliding shaft 51 is slidably provided, the two ends of the second sliding shaft 51 are respectively located at the upper and lower sides of the second connecting plate 500, a third limiting plate 53 is provided at the top of the second sliding shaft 51, a fourth limiting plate 55 is provided at the bottom of the second sliding shaft 51, a fourth spring 52 is provided between the fourth limiting plate 55 and the second connecting plate 500, and the fourth spring 52 is sleeved on the second sliding shaft 51; an adjustment plate 53 is provided at the bottom of the fourth limiting plate 55 A joint stud 57 is provided, and an adjusting plate 56 is slidably provided on the adjusting stud 57. Two first nuts 570 are spaced apart on the adjusting stud 57, and the two first nuts 570 are respectively located on the upper and lower sides of the adjusting plate 56; an adjusting slot 560 is provided on the adjusting plate 56, and a guide column 58 is slidably provided in the adjusting slot 560, and a guide rod 581 is provided at the bottom of the guide column 58; two second nuts 580 are screwed on the guide column 58, and the two second nuts 580 are respectively located on the upper and lower sides of the adjusting plate 56; a sliding arm 43 is provided on the first limiting plate 42, and a sliding cavity 54 is provided on the third limiting plate 53, and the sliding arm 43 is slidably fitted in the sliding cavity 54.

[0060] For two workpieces 7 of a certain length and with the same contour changes in the width direction, when some of the workpieces 7 are welded, there will be a certain gap between the two workpieces 7 to be welded. The gap may be wide or narrow, and there may also be burrs. For such workpieces 7, the welding wire may easily get stuck during the movement of the welding gun, affecting the welding effect.

[0061] In order to avoid the above phenomenon, a guiding mechanism is provided which can adaptively guide the welding gun 47 to conform to the contour of the welding spot, so as to reduce the transition contact between the welding wire and the welding position (welding gap) to a certain extent.

[0062] However, it should be noted that the above-mentioned guiding mechanism is only applicable to parts with a certain length and the same profile change in the width direction; and the workpiece does not have a steep height mutation in the vertical direction.

[0063] Specifically, by adjusting the second nut 580, the guide rod 581 and the guide column 58 can be adjusted along the front-to-back direction of the adjustment plate 56; adjusting the first nut 570 can control the adjustment plate 56 to move up and down along the adjustment stud 57; thereby, the guide column 58 can be adapted to the welding wire in the height direction, that is, the auxiliary welding wire is supported and consistent in the front-to-back direction.

[0064] The sliding arm 43 and the sliding cavity 54 are used to transmit the movement of the guide rod 581 in the up-down direction to the first limit plate 42, thereby assisting the welding gun 47 to move in the up-down direction and avoiding excessive contact between the welding wire and the welding area.

[0065] The movable frame 5 can move along the left and right directions of the support frame 3 to avoid the fixed components to prevent interference.

[0066] The bottoms of the front and rear ends of the movable frame 5 can be arranged on the front and rear sides of the conveying frame through rails. In other embodiments, a tightening knob 8 can also be arranged on the movable frame 5 to achieve temporary fixation of the movable frame 5.

[0067] In some further embodiments, the guide post 58 includes a stop section that is slidably engaged with the adjustment slot 560 .

[0068] The anti-rotation section is a rectangular structure, and a set of opposite side walls on the anti-rotation section abut against the two side walls of the adjustment slot 560 on the adjustment plate 56 to prevent rotation relative to the adjustment slot 560 .

[0069] On the second aspect, the present application also provides a laser welding method for special-shaped titanium alloy thin-walled parts, using the above-mentioned welding device, firstly separate the upper clamp 1 and the lower clamp 2 in the fixing assembly located on one side of the welding gun 47, place one of the workpieces 7 to be welded on the abutment joint 6 located on the lower clamp 2, then close the upper clamp 1 and the lower clamp 2, and fix them with bolts; correspondingly, set the other workpiece 7 to be welded in the fixing assembly on the other side of the welding gun 47, and ensure that the relative positions of the two workpieces 7 along the width direction of the support frame 3 are consistent; then adjust the fixing assemblies on both sides of the welding gun 47 respectively, so that the opposite ends of the two workpieces 7 to be welded are butt-jointed with each other, and then control the welding gun 47 to weld the two workpieces 7 to be welded.

[0070] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection created by this application.

Claims

1. A laser welding device for special-shaped titanium alloy thin-walled parts, characterized in that: The invention comprises a fixing assembly and a welding gun (47); the fixing assembly is slidably arranged along the length direction of the support frame (3), and the welding gun (47) is slidably arranged along the width direction of the support frame (3); the fixing assembly comprises an upper clamping plate (1) and a lower clamping plate (2), and both the upper clamping plate (1) and the lower clamping plate (2) are elastically provided with abutment joints (6) for abutting against a workpiece (7) to be welded, and the number of abutment joints (6) is provided in plurality; a first sliding rod (10) is slidably arranged on the upper clamping plate (1), and a first stop handle (12) is provided at one end of the first sliding rod (10) located on the upper side of the upper clamping plate (1); a second sliding rod (21) is slidably arranged on the lower clamping plate (2), and the first sliding rod (21) is slidably arranged on the lower clamping plate (2), and the first sliding rod (21) is slidably arranged on the lower clamping plate (2). The second sliding rod (21) is provided with a second stop handle (22) at one end located at the lower side of the lower clamping plate (2); the abutment head (6) is correspondingly arranged at the lower end of the first sliding rod (10) and the upper end of the second sliding rod (21); a section of the first sliding rod (10) located at the lower side of the upper clamping plate (1) is sleeved with a first spring (11), and a section of the second sliding rod (21) located at the upper side of the lower clamping plate (2) is sleeved with a second spring (20); the fixing components are provided with at least two groups, and the two groups of the fixing components are respectively located on both sides of the welding gun (47) along the length direction of the support frame (3); the number of the fixing components is four, two of which are located on the welding gun (47) on one side of the welding gun (47), and the other two are located on the other side of the welding gun (47); a push rod (27) is provided on the upper clamping plate (1) and / or the lower clamping plate (2), and a push plate (28) is provided on one end of the push rod (27) which is rotatably provided with a push plate (28) toward a position between the upper clamping plate (1) and the lower clamping plate (2); a slide rail (30) is provided on the support frame (3), and a slider (31) is provided on the slide rail (30); a sliding column (26) is provided at the bottom of the lower clamping plate (2), and a sliding sleeve (25) is provided on the slider (31), and the sliding column (26) and the sliding sleeve (25) are slidably matched; a stud (24) is fixedly provided on the slider (31), and the top of the stud (24) slides The lower clamping plate (2) is penetrated, and an adjusting nut (23) is screwed on the stud (24), and the adjusting nut (23) abuts against the bottom wall of the lower clamping plate (2); a fixing frame (4) is provided on the supporting frame (3), and a first sliding frame (40) is slidably provided on the fixing frame (4), and the first sliding frame (40) comprises a first connecting plate (41), and a first sliding shaft (44) is slidably provided on the first connecting plate (41), a first limiting plate (42) is provided on the top of the first sliding shaft (44), and a second limiting plate (45) is provided on the bottom of the first sliding shaft (44), and a third spring (46) is provided between the second limiting plate (45) and the first connecting plate (41);It also comprises a movable frame (5), a second sliding frame (50) is slidably provided on the movable frame (5), the second sliding frame (50) is provided with a second sliding shaft (51), a third limiting plate (53) is provided on the top of the second sliding shaft (51), a fourth limiting plate (55) is provided on the bottom of the second sliding shaft (51), and a fourth spring (52) is sleeved on the second sliding shaft (51); an adjusting stud (57) is provided at the bottom of the fourth limiting plate (55), an adjusting plate (56) is slidably provided on the adjusting stud (57), and a guide column (58) is slidably provided on the adjusting plate (56); the guide column (58) comprises a rotation-stopping section, and the rotation-stopping section is slidably matched with the adjusting plate (56). ; 2. A laser welding method for special-shaped titanium alloy thin-walled parts, characterized in that: The welding device as claimed in claim 1 comprises:

1. separating the upper clamping plate (1) and the lower clamping plate (2) in the fixing assembly located on one side of the welding gun (47), and placing one of the workpieces (7) to be welded on the abutment (6) located on the lower clamping plate (2); 2. then closing the upper clamping plate (1) and the lower clamping plate (2) together and fixing them with bolts; 3. correspondingly arranging another workpiece (7) to be welded in the fixing assembly on the other side of the welding gun (47), and ensuring that the relative positions of the two workpieces (7) along the width direction of the support frame (3) are consistent; 4. then adjusting the fixing assemblies on both sides of the welding gun (47) respectively so that the opposite ends of the two workpieces (7) to be welded are butted against each other; 5. then controlling the welding gun (47) to weld the two workpieces (7) to be welded.

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