Double station fixture assembly for axial friction stir welding of cylindrical parts and welding apparatus thereof

Abstract

The application provides a double-station clamp assembly for axial weld stirring friction welding of a cylindrical part and a welding device thereof, the double-station clamp assembly comprising a clamp mounting plate, a plurality of sets of clamp moving sliders being fixedly mounted at the bottom of the clamp mounting plate, and the clamp moving sliders being in sliding connection with a clamp driving assembly; a clamp driving cylinder piston mounting plate being fixedly mounted at one end of the clamp mounting plate, a clamp driving oil cylinder being fixedly connected to the clamp driving cylinder piston mounting plate, and two welding clamps being mounted on the clamp mounting plate. The axial positioning of the cylindrical part can be realized through a static support end axial positioning assembly, a dynamic support end axial positioning assembly and a welding workbench dynamic support fixing assembly, the radial positioning and clamping of the cylindrical part can be realized through a clamping mechanism, the accuracy and stability of the installation position of the cylindrical part in the clamp assembly are ensured, and the working efficiency of the axial weld stirring friction welding of the cylindrical part is greatly improved due to the design of the double-station clamp assembly.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of friction welding, and particularly relates to a double-station clamp assembly for axial weld stirring friction welding of a cylindrical part and a welding device thereof. BACKGROUND

[0002] The cylindrical part has the advantages of compact structure and small space occupation, and is a design structure frequently adopted by product designers. Figure 1 As shown in the figure, the existing cylindrical part mainly comprises a circular surface 1, a flat surface 2 and a weld 3 located in the middle of the flat surface 2.

[0003] For the welding of the weld 3 of the cylindrical part by stirring friction welding, the main technical problem at present is how to ensure the stability of the positioning and clamping of the cylindrical part in the process of welding the weld of the cylindrical part. Although there are some general cylindrical part clamps on the market, these general cylindrical part clamps have the problems of uneven clamping force of the cylindrical part, large positioning error and inability to guarantee the welding quality of the weld of the cylindrical part in the process of stirring friction welding of the weld of the cylindrical part. SUMMARY

[0004] In view of the problems in the prior art, the application provides a double-station clamp assembly for axial weld stirring friction welding of a cylindrical part.

[0005] The technical scheme adopted by the application to solve the technical problems is as follows:

[0006] A double-station clamp assembly for axial weld stirring friction welding of a cylindrical part, the double-station clamp assembly comprising a clamp mounting plate, a plurality of groups of clamp moving sliding blocks being fixedly installed at the bottom of the clamp mounting plate, the clamp moving sliding blocks being in sliding connection with a clamp driving assembly; a clamp driving cylinder piston mounting plate being fixedly installed at one end of the clamp mounting plate, a clamp driving oil cylinder being fixedly connected to the clamp driving cylinder piston mounting plate; and at least two welding clamps being installed on the clamp mounting plate.

[0007] As a preferred scheme of the embodiment of the application, the welding clamp comprises a clamp frame, a welding part accommodating space being arranged in the clamp frame, a welding workbench static support body and a welding workbench dynamic support fixed assembly being symmetrically arranged at both sides of the clamp frame; a welding workbench being arranged between the welding workbench static support body and the welding workbench dynamic support fixed assembly, and two clamping mechanisms for clamping the welding workbench being symmetrically installed at the top of the clamp frame.

[0008] As a preferred scheme of the embodiment of the present application, the movable support fixing assembly of the welding workbench comprises a movable support mounting plate fixedly mounted on the clamp frame, the movable support mounting plate is rotationally connected with a movable support body of the welding workbench through a welding workbench movable support hinge, and the movable support body is locked through a welding workbench movable support locking mechanism.

[0009] As a preferred scheme of the embodiment of the present application, the welding workbench comprises a welding workbench body, a welding workbench support clamping groove is arranged on one side of the welding workbench body close to the movable support fixing assembly of the welding workbench, in use, the movable support fixing assembly of the welding workbench is clamped in the welding workbench support clamping groove; a static support end axial positioning assembly is connected with the static support body of the welding workbench through a static support end shaft on one side of the welding workbench body close to the static support body; and a welding gap matched with a welding part is arranged on the top of the welding workbench body.

[0010] As a preferred scheme of the embodiment of the present application, the static support end axial positioning assembly comprises a static support end first axial positioning block clamped on the top end of the static support body of the welding workbench, two symmetrical static support end second axial positioning blocks are fixedly connected on the bottom of the static support end first axial positioning block, and the static support end second axial positioning blocks are connected with the welding workbench through static support end positioning adjusting holes.

[0011] As a preferred scheme of the embodiment of the present application, a movable support end axial positioning assembly is arranged on one side of the welding workbench close to the movable support fixing assembly of the welding workbench, the movable support end axial positioning assembly comprises a movable support end first axial positioning block fixedly connected on one side of the welding workbench, two symmetrical movable support end second axial positioning blocks are arranged on the inner side of the movable support end first axial positioning block, and a movable support end workpiece axial movable positioning block is connected with the movable support end second axial positioning blocks through movable support end positioning adjusting holes on the top of the clamp frame.

[0012] As a preferred scheme of the embodiment of the present application, the welding workbench movable support locking mechanism comprises a locking positioning groove arranged on the end of the movable support body of the welding workbench, a locking positioning block corresponding to the locking positioning groove is arranged on the clamp frame, at least two locking positioning holes are arranged on the locking positioning block, a locking connecting rod is matched with the locking positioning holes, and in use, the locking connecting rod is inserted into the locking positioning holes.

[0013] As a preferred scheme of the embodiment of the present application, each clamping mechanism comprises a clamping mechanism body, a clamping hydraulic cylinder is fixedly connected on one end of the clamping mechanism body, and a clamping jaw is connected on the other end of the clamping mechanism body.

[0014] As a preferred scheme of the embodiment of the present application, an inclined guide groove is arranged on the inner side of the clamping mechanism body, and the two ends of the clamping jaw are embedded in the inclined guide groove, so that when the clamping hydraulic cylinder drives the clamping jaw to move, the clamping jaw will move along the inclined guide groove to the lower side.

[0015] The embodiment of the present application also provides a welding device, which comprises a support base, a clamp driving assembly is fixedly installed on the support base, a support column is arranged on one side of the support base, a Z-axis driving assembly is installed on the support column, an X-axis driving assembly is installed on the Z-axis driving assembly, and a friction stir welding machine is installed on the X-axis driving assembly, and the aforementioned double-station clamp assembly is slidably connected to the clamp driving assembly.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] The double-station clamp assembly for axial weld joint friction stir welding of a cylindrical part provided by the present application can realize axial positioning of the cylindrical part through the static support end axial positioning assembly, the dynamic support end axial positioning assembly and the welding workbench dynamic support fixing assembly, and can realize radial positioning and clamping of the cylindrical part through the clamping mechanism, so that the accuracy and stability of the installation position of the cylindrical part in the clamp assembly are ensured, and the subsequent weld joint friction stir welding of the cylindrical part is effectively guaranteed, and the design of the double-station clamp assembly realizes the synchronous performance of the part loading and unloading and the machining in the working process, so that the working efficiency of the weld joint friction stir welding of the cylindrical part is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application and explain the principles of the present application, and do not constitute a limitation of the present application.

[0019] Figure 1 The overall structure schematic diagram of the cylindrical part provided by the present application is shown in the figure.

[0020] Figure 2 The overall structure schematic diagram of the double-station clamp assembly for axial weld joint friction stir welding of a cylindrical part provided by the present application is shown in the figure.

[0021] Figure 3 The overall structure schematic diagram of the welding clamp provided by the present application is shown in the figure.

[0022] Figure 4 The internal structure sectional view of the welding clamp provided by the present application is shown in the figure.

[0023] Figure 5 Structure diagram of the welding fixture in the clamped state according to the present application;

[0024] Figure 6 Structure diagram of the welding fixture in the unclamped state according to the present application;

[0025] Figure 7 Structure diagram of the welding device according to the present application.

[0026] As shown in the figure: 100, double-station fixture assembly; 101, fixture mounting plate; 102, fixture moving slider; 103, fixture drive cylinder piston mounting plate; 104, welding fixture; 1041, fixture frame; 1042, welding part accommodating space; 1043, welding workbench static support body; 1044, welding workbench dynamic support fixed assembly; 10441, dynamic support mounting plate; 10442, welding workbench dynamic support hinge; 10443, welding workbench dynamic support body; 1045, welding workbench; 10451, welding workbench body; 10452, welding workbench support clamping groove; 10453, welding gap; 1046, clamping mechanism; 10461, clamping mechanism body; 10462, clamping hydraulic cylinder; 10463, clamping jaw; 10464, inclined guide groove; 1047, welding workbench dynamic support locking mechanism; 10471, locking positioning groove; 10472, locking positioning block; 10473, locking positioning hole; 10474, locking connecting rod; 1048, static support end axial positioning assembly; 10481, static support end first axial positioning block; 10482, static support end second axial positioning block; 10483, static support end positioning adjustment hole; 1049, dynamic support end axial positioning assembly; 10491, dynamic support end first axial positioning block; 10492, dynamic support end second axial positioning block; 10493, dynamic support end positioning adjustment hole; 10494, dynamic support end workpiece axial movable positioning block; 200, fixture drive assembly; 300, support column; 400, Z-axis drive assembly; 500, X-axis drive assembly; 600, friction stir welding machine; 700, support base. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0028] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0029] Example One :

[0030] As shown in Figure 2 The double-station clamp assembly 100 specifically comprises a clamp mounting plate 101, a plurality of sets (four sets in this embodiment) of clamp moving sliders 102 are fixedly installed at the bottom of the clamp mounting plate 101, and the clamp moving sliders 102 are in sliding connection with a clamp driving assembly 200. The double-station clamp assembly 100 is driven by the clamp moving sliders 102 to move in the X direction on a clamp moving guide rail 201. A clamp driving cylinder piston mounting plate 103 is fixedly installed at one end of the clamp mounting plate 101, and a clamp driving oil cylinder 201 is fixedly connected to the clamp driving cylinder piston mounting plate 103. Two welding clamps 104 are installed on the clamp mounting plate 101. In this embodiment, the two welding clamps 104 are arranged to allow one welding clamp 104 to be in a state of welding a cylindrical part during welding, and the other welding clamp 104 to be in a state of loading and unloading the cylindrical part. In this way, the loading and unloading and the processing of the part can be simultaneously performed during the working process of the whole device, and the working efficiency of the cylindrical part welding friction stir welding is greatly improved.

[0031] As shown in Figures 3 to 6 The welding clamp 104 comprises a clamp frame 1041 for fixedly supporting the welding clamp 104, a welding part accommodating space 1042 is arranged in the clamp frame 1041, and the cylindrical part is placed in the welding part accommodating space 1042 during processing. Welding workbench static support bodies 1043 and welding workbench dynamic support fixed assemblies 1044 are symmetrically arranged at both sides of the clamp frame 1041, and the positioning of the cylindrical part in the axial direction can be realized through the welding workbench static support bodies 1043 and the welding workbench dynamic support fixed assemblies 1044. A welding workbench 1045 for friction stir welding of the cylindrical part is arranged between the welding workbench static support bodies 1043 and the welding workbench dynamic support fixed assemblies 1044, and two clamping mechanisms 1046 for clamping the welding workbench 1045 are symmetrically installed at the top of the clamp frame 1041. The positioning and clamping of the cylindrical part in the radial direction can be realized through the clamping mechanisms 1046.

[0032] As shown inFigures 3 to 6 As shown in the figure, the welding workbench movable support fixing assembly 1044 specifically comprises a movable support mounting plate 10441 fixedly installed on the clamp frame 1041, the movable support mounting plate 10441 is rotationally connected with a welding workbench movable support body 10443 through a welding workbench movable support hinge 10442, and the welding workbench movable support body 10443 is locked through a welding workbench movable support locking mechanism 1047. In this embodiment, in use, the welding workbench movable support body 10443 is opened, then the cylindrical part is placed in the welding part containing space 1042 with the weld seam of the cylindrical part facing upwards, the cylindrical part is pressed onto the welding workbench 1045 through the clamping mechanism 1046, then the welding workbench movable support body 10443 is closed, and finally the welding workbench movable support body 10443 is locked through the welding workbench movable support locking mechanism 1047.

[0033] Please refer to Figures 3 to 6 As shown in the figure, the welding workbench movable support locking mechanism 1047 comprises a locking positioning groove 10471 arranged at the end of the welding workbench movable support body 10443, a locking positioning block 10472 corresponding to the locking positioning groove 10471 is arranged on the clamp frame 1041, at least two locking positioning holes 10473 (in this embodiment, three locking positioning holes 10473 are arranged) are arranged on the locking positioning block 10472, and a locking connecting rod 10474 is matched on the locking positioning hole 10473. In use, the locking positioning groove 10471 is clamped into the locking positioning block 10472, then the locking connecting rod 10474 is inserted into the locking positioning hole 10473, and the locking of the welding workbench movable support body 10443 is realized through the positioning and matching of the locking connecting rod 10474 and the locking positioning hole 10473.

[0034] Please refer to Figures 3 to 6As shown, the welding workbench 1045 specifically comprises a welding workbench body 10451, and a welding workbench support clamping groove 10452 is arranged on one side of the welding workbench body 10451 close to the welding workbench movable support fixing assembly 1044. In use, the welding workbench movable support fixing assembly 1044 (specifically, the inner side of the welding workbench movable support body 10443 is clamped in the welding workbench support clamping groove 10452) is clamped in the welding workbench support clamping groove 10452. The welding workbench body 10451 is connected with the welding workbench static support body 1043 through a static support end axial positioning assembly 1048 on one side close to the welding workbench static support body 1043. A welding gap 10453 matched with a welding part is arranged on the top of the welding workbench body 10451. In this embodiment, the inner side of the welding workbench movable support body 10443 is clamped in the welding workbench support clamping groove 10452, and the welding workbench body 10451 is limited on the side opposite to the welding workbench movable support fixing assembly 1044 through the static support end axial positioning assembly 1048. The cylindrical part is installed on the lower part of the welding workbench 1045, so that the axial positioning of the cylindrical part can be realized through the welding workbench 1045, the welding workbench static support body 1043, the welding workbench movable support body 10443 and the square steel (not marked in the figure) at the bottom.

[0035] Please refer to Figures 3 to 6As shown, the static support end axial positioning assembly 1048 specifically comprises a static support end first axial positioning block 10481 clamped at the top end of the static support body 1043 of the welding workbench, and two symmetrical static support end second axial positioning blocks 10482 fixedly connected at the bottom of the static support end first axial positioning block 10481, and the static support end second axial positioning blocks 10482 are connected with the welding workbench 1045 through static support end positioning adjusting holes 10483. An active support end axial positioning assembly 1049 is arranged on one side of the welding workbench 1045 close to the active support fixed assembly 1044 of the welding workbench, and the active support end axial positioning assembly 1049 comprises an active support end first axial positioning block 10491 fixedly connected to one side of the welding workbench 1045, and two symmetrical active support end second axial positioning blocks 10492 are arranged at the inner side of the active support end first axial positioning block 10491, and an active support end workpiece axial movable positioning block 10494 is connected to the top of the clamp frame 1041 through an active support end positioning adjusting hole 10493, and the active support end workpiece axial movable positioning block 10494 cooperates with the active support end second axial positioning blocks 10492. In this embodiment, before welding, after the cylindrical part is placed into the welding part containing space 1042, the welding workbench active support body 10443 is closed and locked by the welding workbench active support locking mechanism 1047, and then the welding workbench 1045 is fixed by the fixed nuts in the static support end positioning adjusting holes 10483 on the static support end second axial positioning blocks 10482, so that the cylindrical part is positioned close to the side of the static support end, and then the welding workbench 1045 is fixed by the active support end second axial positioning blocks 10492, and finally the active support end second axial positioning blocks 10492 are fixed by adjusting the active support end positioning adjusting holes 10493 on the active support end workpiece axial movable positioning block 10494. In this way, the static support end axial positioning assembly 1048 and the active support end axial positioning assembly 1049 are used to further axially position and fix the cylindrical part.

[0036] Please refer to Figures 3 to 6As shown, the clamping mechanism 1046 comprises a clamping mechanism body 10461, a clamping hydraulic cylinder 10462 is fixedly connected to one end of the clamping mechanism body 10461, and a clamping jaw 10463 is connected to the other end of the clamping mechanism body 10461. An inclined guide groove 10464 is arranged on the inner side of the clamping mechanism body 10461, and the two ends of the clamping jaw 10463 are embedded in the inclined guide groove 10464. When the clamping hydraulic cylinder 10462 drives the clamping jaw 10463 to move, the clamping jaw 10463 will move obliquely downward along the inclined guide groove 10464. In this embodiment, the two clamping mechanisms 1046 are symmetrically installed. When in use, the clamping jaw 10463 is driven to move by the clamping hydraulic cylinder 10462. At this time, the clamping jaw 10463 will move obliquely downward along the inclined guide groove 10464, thereby achieving clamping of the cylindrical part. In this way, the oblique downward clamping force of the clamping mechanism 1046 is used to achieve radial positioning and clamping of the cylindrical part.

[0037] In this embodiment, the axial positioning of the cylindrical part is achieved by the static support end axial positioning assembly 1048, the dynamic support end axial positioning assembly 1049 and the welding workbench dynamic support fixing assembly 1044 on the double-station clamp assembly 100. The radial positioning and clamping of the cylindrical part is achieved by the clamping mechanism 1046, thereby ensuring the accuracy of the installation position of the cylindrical part, and ensuring the accuracy and stability of the welding of the weld of the cylindrical part.

[0038] Example Two :

[0039] Please refer to Figure 7As shown, the embodiment of the present application also provides a welding device, specifically comprising a support base 700 for fixedly supporting the entire device, a clamp driving assembly 200 fixedly installed on the support base 700, and a double-station clamp assembly 100 of the first embodiment slidably connected to the clamp driving assembly 200; a support column 300 is arranged on one side of the support base 700, a Z-axis driving assembly 400 is installed on the support column 300, an X-axis driving assembly 500 is installed on the Z-axis driving assembly 400, and a friction stir welding machine 600 is installed on the X-axis driving assembly 500. In this embodiment, the double-station clamp assembly 100 can move in the X direction through the clamp driving assembly 100 arranged in the X direction on the support base 700, and the friction stir welding machine 600 can move in the Z direction and the X direction through the Z-axis driving assembly 400 arranged in the Z direction on the support column 300 and the X-axis driving assembly 500 installed on the Z-axis driving assembly 400. The friction stir welding machine 600 can rotate around its center through the rotation of the friction stir welding machine spindle mounting turntable 603 under the action of the friction stir welding machine spindle angle adjusting screw 604, thereby adjusting the angle of the friction stir welding machine 600 spindle, and the adjustment of the angle can adjust the forward inclination angle of the friction stir welding process parameters to ensure the accuracy and stability of the friction stir welding of the cylindrical part weld. The axial positioning assembly 1048 on the static support end of the double-station clamp assembly 100 and the welding workbench dynamic support fixing assembly 1044 can achieve axial positioning of the cylindrical part. The clamping mechanism 1047 on the double-station clamp assembly 100 can achieve positioning and clamping of the cylindrical part, thereby ensuring the accuracy of the installation position of the cylindrical part and further ensuring the accuracy and stability of the cylindrical part weld.

[0040] It will be obvious to a person skilled in the art that, as the application is not limited to the details of the foregoing exemplary embodiments but can be implemented in other specific forms without departing from the spirit or essential characteristics of the application, the present application can be carried out not only as described but also by an equivalent means without departing from the scope of the attached claims. Therefore, the embodiments are to be considered in all respects as illustrative and not restrictive, and the scope of the application shall be governed by the appended claims rather than the foregoing description, and it is intended to embrace all the changes and modifications that fall into the meaning and scope of the equivalent elements of the claims. Any reference signs in the claims should not be construed as limiting the claims involved.

[0041] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A dual station fixture assembly for axial friction stir welding of a cylindrical part, characterized by: The dual-station fixture assembly (100) includes a fixture mounting plate (101), and several sets of fixture moving sliders (102) are fixedly installed at the bottom of the fixture mounting plate (101). The fixture moving sliders (102) are slidably connected to the fixture drive assembly (200). A fixture drive cylinder piston mounting plate (103) is fixedly installed at one end of the fixture mounting plate (101), and a fixture drive cylinder (201) is fixedly connected to the fixture drive cylinder piston mounting plate (103). Two welding fixtures (104) are installed on the fixture mounting plate (101). The welding fixture (104) includes a fixture frame (1041), a welding part receiving space (1042) is provided in the fixture frame (1041), a welding workbench static support body (1043) and a welding workbench dynamic support fixing assembly (1044) are symmetrically arranged on both sides of the fixture frame (1041); a welding workbench (1045) is arranged between the welding workbench static support body (1043) and the welding workbench dynamic support fixing assembly (1044), and two clamping mechanisms (1046) for clamping the welding workbench (1045) are symmetrically installed on the top of the fixture frame (1041). The welding workbench dynamic support fixing assembly (1044) includes a dynamic support mounting plate (10441) fixedly mounted on the clamp frame (1041). The dynamic support mounting plate (10441) is rotatably connected to the welding workbench dynamic support body (10443) via a welding workbench dynamic support hinge (10442). The welding workbench dynamic support body (10443) is locked by a welding workbench dynamic support locking mechanism (1047). The welding workbench (1045) includes a welding workbench body (10451). A welding workbench support slot (10452) is provided on the side of the welding workbench body (10451) near the welding workbench dynamic support fixing component (1044). In use, the welding workbench dynamic support fixing component (1044) is snapped into the welding workbench support slot (10452). The side of the welding workbench body (10451) near the welding workbench static support body (1043) is connected to the welding workbench static support body (1043) through a static support end axial positioning component (1048). A welding gap (10453) is provided on the top of the welding workbench body (10451) to cooperate with the welding parts. The static support end axial positioning assembly (1048) includes a static support end first axial positioning block (10481), which is clamped on the top of the static support body (1043) of the welding workbench. Two symmetrical static support end second axial positioning blocks (10482) are fixedly connected to the bottom of the static support end first axial positioning block (10481). The static support end second axial positioning blocks (10482) are connected to the welding workbench (1045) through the static support end positioning adjustment hole (10483).

2. Double station clamp assembly for axial friction stir welding of cylindrical part weld seams according to claim 1, characterized in that An axial positioning component (1049) for the moving support end is provided on the side of the welding workbench (1045) near the moving support fixing component (1044). The axial positioning component (1049) for the moving support end includes a first axial positioning block (10491) for the moving support end, which is fixedly connected to one side of the welding workbench (1045). Two symmetrical second axial positioning blocks (10492) for the moving support end are provided inside the first axial positioning block (10491). A movable axial positioning block (10494) for the moving support end workpiece is connected to the top of the fixture frame (1041) through a moving support end positioning adjustment hole (10493). The movable axial positioning block (10494) for the moving support end workpiece cooperates with the second axial positioning block (10492) for the moving support end.

3. The dual-station fixture assembly for axial friction stir welding of cylindrical parts according to claim 1, characterized in that: The welding workbench moving support locking mechanism (1047) includes a locking positioning groove (10471) provided at the end of the welding workbench moving support body (10443). A locking positioning block (10472) corresponding to the locking positioning groove (10471) is provided on the fixture frame (1041). At least two locking positioning holes (10473) are provided on the locking positioning block (10472). A locking connecting rod (10474) is fitted on the locking positioning hole (10473). In use, the locking connecting rod (10474) is inserted into the locking positioning hole (10473).

4. The dual-station fixture assembly for axial friction stir welding of cylindrical parts according to claim 1, characterized in that: Each clamping mechanism (1046) includes a clamping mechanism body (10461), a clamping hydraulic cylinder (10462) is fixedly connected to one end of the clamping mechanism body (10461), and a gripper (10463) is connected to the other end of the clamping mechanism body (10461).

5. The dual-station fixture assembly for axial friction stir welding of cylindrical parts according to claim 4, characterized in that: An inclined guide groove (10464) is provided on the inner side of the clamping mechanism body (10461). The two ends of the gripper (10463) are embedded in the inclined guide groove (10464). When the clamping hydraulic cylinder (10462) drives the gripper (10463) to move, the gripper (10463) will move obliquely downward along the inclined guide groove (10464).

6. A welding apparatus, comprising a support base (700), a clamp drive assembly (200) fixedly mounted on the support base (700), a support column (300) provided on one side of the support base (700), a Z-axis drive assembly (400) mounted on the support column (300), an X-axis drive assembly (500) mounted on the Z-axis drive assembly (400), and a friction stir welding machine (600) mounted on the X-axis drive assembly (500), characterized in that: It also includes a dual-station fixture assembly (100) according to any one of claims 1 to 5, the dual-station fixture assembly (100) being slidably connected to the fixture drive assembly (200).

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