Friction stir welding device for axial weld joints of cylindrical parts

Abstract

The invention provides a cylindrical part axial weld joint stirring friction welding device which comprises a supporting base, a clamp driving assembly is fixedly installed on the supporting base, and a double-station clamp assembly is connected to the clamp driving assembly; a supporting stand column is arranged on one side of the supporting base, a Z-axis driving assembly is installed on the supporting stand column, an X-axis driving assembly is installed on the Z-axis driving assembly, and a stirring friction welding machine is installed on the X-axis driving assembly. Through the clamp driving assembly arranged on the supporting base in the X direction, movement of the double-station clamp assembly in the X direction can be achieved; through the Z-axis driving assembly arranged on the supporting stand column and the X-axis driving assembly installed on the Z-axis driving assembly, movement of the friction stir welding machine in the Z direction and the X direction can be achieved; the cylindrical part can be positioned and clamped through the double-station clamp assembly, and the welding accuracy and stability of the welding seam of the cylindrical part are guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of friction stir welding, and in particular relates to a friction stir welding device for an axial weld of a cylindrical part. Background Art

[0002] Cylindrical parts have the advantages of compact structure and small space occupation, and are often used by product designers. Figure 1 As shown, the existing cylindrical parts using stir friction welding are mainly composed of a circular surface 1, a plane 2 and a weld 3 located in the middle of the plane 2.

[0003] At present, the welding of the weld 3 of the cylindrical part is still mainly completed by manual welding, which is time-consuming. At the same time, since the weld needs to have a sufficiently high welding strength, the workers are required to have high welding skills, and there is a shortage of workers with such high skills in the market. This urgently requires a device that can replace manual labor and can efficiently complete the welding of welds on cylindrical parts. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a friction stir welding device for an axial weld of a cylindrical part.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0006] A friction stir welding device for an axial weld of a cylindrical part comprises a support base, on which a fixture drive assembly is fixedly mounted, and on which a double-station fixture assembly is connected; a support column is arranged on one side of the support base, on which a Z-axis drive assembly is mounted, on which an X-axis drive assembly is mounted, and on which a friction stir welding machine is mounted.

[0007] As a preferred solution of an embodiment of the present invention, the fixture driving assembly includes a fixture moving guide rail, a fixture driving cylinder and a fixture positioning support cylinder. The fixture moving guide rail is fixedly installed on the support base along the X direction. The fixture driving cylinder is used to drive the double-station fixture assembly to move along the X direction; the fixture positioning support cylinder is used to position the movement of the double-station fixture assembly.

[0008] As a preferred solution of an embodiment of the present invention, the Z-axis drive assembly includes a Z-axis motion guide rail, a Z-axis drive screw and a Z-axis drive motor; the Z-axis motion guide rail and the Z-axis drive screw are fixedly mounted on a supporting column, the Z-axis drive motor is fixedly connected to one end of the Z-axis drive screw, and the Z-axis drive motor drives the X-axis drive assembly and the friction stir welding machine to move in the Z direction along the Z-axis guide rail.

[0009] As a preferred solution of an embodiment of the present invention, the Z-axis drive assembly also includes a Z-axis balancing cylinder, which is arranged on one side of the Z-axis drive motor and is used to balance the weight of the X-axis drive assembly and the friction stir welding machine.

[0010] As a preferred solution of an embodiment of the present invention, the X-direction drive assembly includes an X-direction drive mounting plate, a Z-axis motion slider is fixedly connected to the bottom of the X-direction drive mounting plate, the Z-axis motion slider is slidably connected to the Z-axis motion guide rail, an X-axis motion guide rail is installed on the X-direction drive mounting plate, an X-axis drive screw is installed on the X-direction drive mounting plate, and an X-axis drive motor is connected to one end of the X-axis drive screw.

[0011] As a preferred solution of an embodiment of the present invention, the friction stir welding machine includes a friction welding machine spindle mounting turntable, a friction welding machine spindle angle adjustment bolt is arranged on the side of the friction welding machine spindle mounting turntable, a friction welding machine spindle box is fixedly installed on the friction welding machine spindle mounting turntable, a friction welding machine spindle is arranged in the friction welding machine spindle box, and a friction stir welding head is arranged at the end of the friction welding machine spindle.

[0012] As a preferred solution of an embodiment of the present invention, a friction welding machine spindle motor is fixedly connected to the end of the friction welding machine spindle opposite to the friction stir welding head, the friction welding machine spindle motor is connected to the friction welding machine spindle through a friction welding machine spindle coupling, and the friction welding machine spindle motor is fixedly connected to the friction welding machine spindle box through a friction welding machine spindle mounting frame.

[0013] As a preferred solution of the embodiment of the present invention, a plurality of waist-shaped adjustment holes are arranged near the edge of the friction welding machine spindle mounting turntable, and a friction welding machine spindle angle adjustment locking nut is arranged on the waist-shaped adjustment hole.

[0014] As a preferred solution of an embodiment of the present invention, a welding machine mounting plate is connected to the bottom of the friction welding machine spindle mounting turntable, an X-axis motion slider is fixedly installed at the bottom of the welding machine mounting plate, and the X-axis motion slider is slidably connected to the X-axis drive assembly.

[0015] As a preferred solution of an embodiment of the present invention, the double-station fixture assembly includes a fixture mounting plate, at the bottom of which a plurality of fixture moving slide blocks are fixedly mounted, and the fixture moving slide blocks are slidably connected to the fixture driving assembly; a fixture driving cylinder piston mounting plate is fixedly mounted at one end of the fixture mounting plate, and the fixture driving cylinder is fixedly connected to the fixture driving cylinder piston mounting plate; and at least two welding fixtures are mounted on the fixture mounting plate.

[0016] As a preferred solution of an embodiment of the present invention, the welding fixture includes a fixture frame, a welding parts accommodating space is arranged in the fixture frame, and a welding workbench static support body and a welding workbench dynamic support and fixing assembly are symmetrically arranged on both sides of the fixture frame; a welding workbench is arranged between the welding workbench static support body and the welding workbench dynamic support and fixing assembly, and two clamping mechanisms for clamping the welding workbench are symmetrically installed on the top of the fixture frame.

[0017] As a preferred solution of an embodiment of the present invention, the dynamic support fixing assembly of the welding workbench includes a dynamic support mounting plate fixedly mounted on the clamp frame, the dynamic support mounting plate is rotatably connected to the dynamic support body of the welding workbench through a dynamic support hinge of the welding workbench, and the dynamic support body of the welding workbench is locked by a dynamic support locking mechanism of the welding workbench.

[0018] As a preferred solution of an embodiment of the present invention, the welding workbench includes a welding workbench body, and a welding workbench support slot is provided on the side of the welding workbench body close to the dynamic support and fixing assembly of the welding workbench. When in use, the dynamic support and fixing assembly of the welding workbench is clamped in the welding workbench support slot; the side of the welding workbench body close to the static support body of the welding workbench is connected to the static support body of the welding workbench through the axial positioning assembly of the static support end; and a welding gap matching the welding parts is provided on the top of the welding workbench body.

[0019] As a preferred solution of an embodiment of the present invention, the static support end axial positioning assembly includes a first axial positioning block of the static support end, which is clamped on the top of the static support body of the welding workbench, and two symmetrical second axial positioning blocks of the static support end are fixedly connected to the bottom of the first axial positioning block of the static support end, and the second axial positioning block of the static support end is connected to the welding workbench through the static support end positioning adjustment hole.

[0020] As a preferred solution of an embodiment of the present invention, a dynamic support end axial positioning assembly is arranged on one side of the welding workbench close to the dynamic support fixing assembly of the welding workbench, and the dynamic support end axial positioning assembly includes a first axial positioning block of the dynamic support end, and the first axial positioning block of the dynamic support end is fixedly connected to one side of the welding workbench, and two symmetrical second axial positioning blocks of the dynamic support end are arranged on the inner side of the first axial positioning block of the dynamic support end, and a dynamic support end workpiece axial movable positioning block is connected to the top of the fixture frame through the dynamic support end positioning adjustment hole, and the dynamic support end workpiece axial movable positioning block cooperates with the dynamic support end second axial positioning block.

[0021] As a preferred solution of an embodiment of the present invention, the dynamic support locking mechanism of the welding workbench includes a locking positioning groove arranged at the end of the dynamic 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, and a locking connecting rod is matched on the locking positioning hole. When in use, the locking connecting rod is inserted into the locking positioning hole.

[0022] As a preferred solution of the embodiment of the present invention, each clamping mechanism includes a clamping mechanism body, one end of which is fixedly connected to a clamping hydraulic cylinder, and the other end of which is connected to a clamping claw.

[0023] As a preferred solution of the embodiment of the present invention, an inclined guide groove is provided on the inner side of the clamping mechanism body, and both ends of the clamping jaw are embedded in the inclined guide groove. When the clamping hydraulic cylinder drives the clamping jaw to move, the clamping jaw will move obliquely downward along the inclined guide groove.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The friction stir welding device for axial welds of cylindrical parts described in the present invention can realize the movement of the double-station fixture assembly in the X direction by means of a fixture drive assembly arranged along the X direction on the support base; can realize the movement of the friction stir welding machine in the Z direction and the X direction by means of a Z-axis drive assembly arranged along the Z direction on the support column and an X-axis drive assembly installed on the Z-axis drive assembly; can realize the rotation movement of the friction stir welding mechanism around its center of circle by means of a friction welding machine spindle mounting turntable on the friction stir welding machine under the action of the friction welding machine spindle angle adjustment bolt , and then the main shaft angle of the stir friction welding machine can be adjusted. Through the adjustment of this angle, the forward inclination angle of the stir friction welding process parameters can be adjusted to ensure the accuracy and stability of the stir friction welding of the cylindrical part weld; the axial positioning of the cylindrical part can be achieved through the static support end axial positioning assembly on the double-station fixture assembly and the dynamic support fixing assembly of the welding workbench, and the cylindrical part can be positioned and clamped through the clamping mechanism on the double-station fixture assembly, thereby ensuring the accuracy of the installation position of the cylindrical part, and further ensuring the accuracy and stability of the welding of the cylindrical part weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0027] Figure 1 A schematic diagram of the overall structure of the cylindrical part provided by the present invention;

[0028] Figure 2It is a schematic diagram of the overall structure of the friction stir welding device for the axial weld of a cylindrical part of the present invention;

[0029] Figure 3 It is a schematic diagram of the installation structure of the support base, support column and Z-axis drive assembly of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the X-axis drive assembly of the present invention;

[0031] Figure 5 It is a schematic diagram of the overall structure of the friction stir welding machine of the present invention;

[0032] Figure 6 It is a partial cross-sectional view of the installation structure of the main shaft installation turntable of the friction welding machine and the welding machine installation plate in the present invention;

[0033] Figure 7 for Figure 5 A schematic diagram of the enlarged structure of the middle part A;

[0034] Figure 8 It is a structural schematic diagram of the double-station clamp assembly of the present invention;

[0035] Fig. 9 It is a schematic diagram of the overall structure of the welding fixture of the present invention;

[0036] Fig.10 This is a cross-sectional view of the internal structure of the welding fixture of the present invention;

[0037] Fig.11 It is a structural schematic diagram of the welding fixture of the present invention in a clamping state;

[0038] Fig.12 It is a structural schematic diagram of the welding fixture of the present invention in a non-clamping state;

[0039] Fig.13 Schematic diagram of the welding front tilt angle adjustment in an embodiment of the present invention.

[0040] 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 parts accommodating space; 1043, welding workbench static support body; 1044, welding workbench dynamic support fixing 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 slot; 10453, welding room gap; 1046, clamping mechanism; 10461, clamping mechanism body; 10462, clamping hydraulic cylinder; 10463, clamping claw; 10464, oblique guide groove; 1047, dynamic support locking mechanism of welding workbench; 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 10492, the first axial positioning block of the moving support end; 10493, the positioning adjustment hole of the moving support end; 10494, the axial movable positioning block of the workpiece at the moving support end; 200, the fixture drive assembly; 201, the fixture moving guide rail; 202, the fixture drive cylinder; 203, the fixture positioning support cylinder; 300, the support column; 400, the Z-axis drive assembly; 401, the Z-axis motion guide rail; 402, the Z-axis drive screw; 403, the Z-axis drive motor; 404, the Z-axis balance cylinder; 500, the X-axis drive assembly; 501, the X-direction drive mounting plate; 502, the Z-axis motion slider; 503, the X-axis motion Guide rail; 504, X-axis driving screw; 505, X-axis driving motor; 600, friction stir welding machine; 601, welding machine mounting plate; 602, X-axis motion slider; 603, friction welding machine spindle mounting turntable; 604, friction welding machine spindle angle adjustment bolt; 605, friction welding machine spindle angle adjustment locking nut; 606, friction welding machine spindle motor; 607, friction welding machine spindle coupling; 608, friction welding machine spindle box; 609, friction welding machine spindle; 6010, friction stir welding head; 6011, friction welding machine spindle mounting frame; 6012, waist-shaped adjustment hole; 700, support base. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] See also Figure 2 As shown, an embodiment of the present invention provides a friction stir welding device for axial welds of cylindrical parts, including a support base 700 for fixedly supporting the entire device, a fixture drive assembly 200 is fixedly installed on the support base 700, and a double-station fixture assembly 100 is connected to the fixture drive assembly 200; a support column 300 is arranged on one side of the support base 700, a Z-axis drive assembly 400 is installed on the support column 300, an X-axis drive assembly 500 is installed on the Z-axis drive assembly 400, and a friction stir welding machine 600 is installed on the X-axis drive assembly 500. In this embodiment, by setting the fixture drive assembly 100 along the X direction on the support base 700, the movement of the double-station fixture assembly 100 in the X direction can be realized, and by setting the Z-axis drive assembly 400 along the Z direction on the support column 300 and the X-axis drive assembly 500 installed on the Z-axis drive assembly 400, the movement of the friction stir welding machine 600 in the Z direction and the X direction can be realized. The friction welding machine spindle mounting turntable 603 on the friction welding machine 600 can realize the rotational movement of the friction welding mechanism 600 around its center under the action of the friction welding machine spindle angle adjustment bolt 604, thereby realizing the adjustment of the spindle angle of the friction welding machine 600. Through the adjustment of this angle, the forward inclination angle of the friction welding process parameters can be adjusted to ensure the accuracy and stability of the friction welding of the weld seam of the cylindrical part. The axial positioning of the cylindrical part can be achieved through the static support end axial positioning component 1048 on the double-station fixture assembly 100 and the dynamic support fixing component 1044 of the welding table. The clamping mechanism 1047 on the double-station fixture assembly 100 can realize the 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 welding of the weld seam of the cylindrical part.

[0044] See also Figure 3 and Figure 4As shown, the fixture drive assembly 200 specifically includes a fixture moving guide rail 201, a fixture driving oil cylinder 202 and a fixture positioning support cylinder 203. The fixture moving guide rail 201 is fixedly installed on the support base 700 along the X direction. The fixture driving oil cylinder 201 is used to drive the double-station fixture assembly 100 to move along the fixture moving guide rail 201 in the X direction. The fixture positioning support cylinder 203 is used to position the movement of the double-station fixture assembly 100. The Z-axis drive assembly 400 specifically includes a Z-axis motion guide rail 401, a Z-axis drive lead screw 402 and a Z-axis drive motor 403; the Z-axis motion guide rail 401 and the Z-axis drive lead screw 402 are fixedly installed on the support column 300, and the Z-axis drive motor 403 is fixedly connected to one end of the Z-axis drive lead screw 402. The Z-axis drive motor 403 drives the X-axis drive assembly 500 and the friction stir welding machine 600 to move along the Z-axis guide rail 401 in the Z direction. A Z-axis balancing oil cylinder 404 is provided on one side of the Z-axis driving motor 403, and the Z-axis balancing oil cylinder 404 is used to balance the weight of the X-axis driving assembly 500 and the friction stir welding machine 600, and can also reduce the load of the Z-axis driving motor 403. The X-direction driving assembly 500 specifically includes an X-direction driving mounting plate 501, a Z-axis motion slider 502 is fixedly connected to the bottom of the X-direction driving mounting plate 501, and the Z-axis motion slider 502 is slidably connected to the Z-axis motion guide rail 401, an X-axis motion guide rail 503 is installed on the X-direction driving mounting plate 501, an X-axis driving lead screw 504 is installed on the X-direction driving mounting plate 501, and an X-axis driving motor 505 is connected to one end of the X-axis driving lead screw 504. In this embodiment, the Z-axis motion slider 502 cooperates with the Z-axis guide rail 401 to achieve linear motion of the X-direction driving assembly 500 in the Z-axis direction. The X-direction drive mounting plate 501 is mounted on the Z-axis drive lead screw 402, and the X-direction drive assembly 500 can be moved along the Z direction through the Z-axis drive motor 403. The X-direction drive assembly 500 and the Z-axis drive assembly 400 can realize linear motion of the friction stir welding machine 600 in the X direction and the Z direction.

[0045] See also Figures 5 to 7As shown, the friction stir welding machine 600 specifically includes a friction welding machine spindle mounting turntable 603, a welding machine mounting plate 601 is connected to the bottom of the friction welding machine spindle mounting turntable 603, an X-axis motion slider 602 is fixedly installed at the bottom of the welding machine mounting plate 601, and the X-axis motion slider 602 is slidably connected to the X-axis driving assembly 500. The X-axis motion slider 602 slides on the X-axis driving assembly 500 to drive the friction stir welding machine 600 to move linearly in the X direction. A friction welding machine spindle angle adjustment bolt 604 is arranged on the side of the friction welding machine spindle mounting turntable 603, one end of the friction welding machine spindle angle adjustment bolt 604 is connected to the welding machine mounting plate 601, and the other end is connected to the friction welding machine spindle mounting turntable 603. A friction welding machine spindle box 608 is fixedly mounted on the friction welding machine spindle mounting turntable 3, a friction welding machine spindle 609 is arranged in the friction welding machine spindle box 608, and a friction stir welding head 6010 is arranged at the end of the friction welding machine spindle 609. A plurality of waist-shaped adjustment holes 6012 are arranged near the edge of the friction welding machine spindle mounting turntable 603 (in this embodiment, four waist-shaped adjustment holes 6012 are arranged near the edge of the friction welding machine spindle mounting turntable 603 along the circumferential direction), and a friction welding machine spindle angle adjustment locking nut 605 is arranged on the waist-shaped adjustment hole 6012. In this embodiment, the friction welding machine spindle mounting turntable 3 is under the action of the friction welding machine spindle angle adjustment bolt 4 (in this embodiment, the friction welding machine spindle angle adjustment bolt 604 is preferably a positive and negative thread stud bolt, which is connected to the friction welding machine spindle mounting turntable 603 through the positive and negative thread stud bolt, and the rotation angle of the friction welding machine spindle mounting turntable 603 can be adjusted when the positive and negative thread stud bolt is rotated manually). The friction welding machine spindle mounting turntable 603 can realize rotational movement around its center of the circle, thereby realizing the adjustment of the angle of the friction welding machine spindle 609 thereon. After the adjustment is completed, the friction welding machine spindle 609 angle adjustment locking nut 605 is passed through the waist-shaped adjustment hole 6012 to tighten the angle of the friction welding machine spindle mounting turntable 603. This angle adjustment can realize the adjustment of the leading angle of the stir friction welding process parameter. To further optimize this embodiment, an angle adjustment dial (not shown) is provided on the welding machine mounting plate 601 at a position corresponding to the waist-shaped adjustment hole 6012, through which the adjustment angle of the friction welding machine spindle mounting turntable 603 can be observed.

[0046] Next we combine Fig.13As shown, the principle of adjusting the leading angle of the friction stir welding process parameter is introduced. The movement direction of the welding head in the weld is the tangent direction of the weld. The spindle (i.e., the friction welding machine spindle 609) is initially in the AB position, and the leading angle at this time is 0. By adjusting the radial distance d (i.e., by adjusting the angle of the friction welding machine spindle mounting turntable 603 to complete the adjustment of the friction welding machine spindle 609 angle), the spindle is initially in the A, B, position, and the leading angle at this time is a. Therefore, by adjusting the radial moving distance, the leading angle a can be adjusted. We know that the size of the leading angle in the friction stir welding process is related to the welding process parameters. For specific welding materials and processes, the leading angle is basically fixed. Therefore, in the embodiment of the present invention, according to different welding objects and processes, the friction stir welding device can adjust the position of the friction welding machine spindle angle adjustment bolt 604 before welding, and use the friction welding machine spindle 609 angle adjustment locking nut 605 to lock the position of the friction welding machine spindle mounting turntable 603, so that the angle of the friction welding machine spindle 609 is fixed, thereby ensuring that the forward tilt angle remains unchanged during the friction stir welding process.

[0047] See also Figures 5 to 7 As shown, a friction welding machine spindle motor 606 is fixedly connected to one end of the friction welding machine spindle 609 opposite to the friction stir welding head 6010, and the friction welding machine spindle motor 606 is connected to the friction welding machine spindle 609 through a friction welding machine spindle coupling 607. The friction welding machine spindle motor 606 is fixedly connected to the friction welding machine spindle box 608 through a friction welding machine spindle mounting frame 6011. The friction welding machine spindle coupling 607 is installed in the friction welding machine spindle mounting frame 6011. In this embodiment, the friction welding machine spindle motor 606 is connected to the friction welding machine spindle box 608 through the friction welding machine spindle mounting frame 6011, and the friction welding machine spindle coupling 607 is installed in the friction welding machine spindle mounting frame 6011, so that the overall structure is more compact and can also ensure the stability of the friction stir welding machine during friction stir welding. The friction stir welding head 6010 on the friction welding machine spindle 609 is driven by the friction welding machine spindle motor 606 to realize the friction stir welding of the weld of the cylindrical part.

[0048] See also Figure 5As shown, a plurality of adjusting and replacing screws 6013 (at least three adjusting and replacing screws 6013) are arranged at the front end of the friction welding machine main shaft 609 along the circumferential direction, and the friction welding machine main shaft 609 is connected to the friction stir welding head 6010 through the adjusting and replacing screws 6013. In this embodiment, different friction stir welding heads can be installed by adjusting and replacing screws 6013 to achieve different functions. Specifically, the friction stir welding head 6010 includes a welding head and a plugging head, the welding head welds the annular weld, and the plugging head fills the keyhole after the welding is completed.

[0049] See also Figure 8 As shown, the double-station fixture assembly 100 includes a fixture mounting plate 101, and a plurality of groups (four groups in this embodiment) of fixture moving slide blocks 102 are fixedly installed at the bottom of the fixture mounting plate 101, and the fixture moving slide blocks 102 are slidably connected to the fixture driving assembly 200. The double-station fixture assembly 100 is driven by the fixture moving slide block 102 to move in the X direction on the fixture moving guide rail 201. A fixture driving cylinder piston mounting plate 103 is fixedly installed at one end of the fixture mounting plate 101, and the fixture driving oil cylinder 201 is fixedly connected to the fixture driving cylinder piston mounting plate 103. Two welding fixtures 104 are installed on the fixture mounting plate 101. In this embodiment, by setting two welding fixtures 104, when a cylindrical part is welded, one welding fixture 104 is always in a cylindrical part weld welding state, and the other welding fixture 104 is in a cylindrical part loading and unloading state. This allows the entire equipment to achieve simultaneous work in the two working states of parts loading and unloading and processing during the working process, greatly improving the working efficiency of friction stir welding of cylindrical parts welds.

[0050] See also Figures 9 to 12 As shown, the welding fixture 104 specifically includes a fixture frame 1041 for fixing and supporting the welding fixture 104. A welding part accommodating space 1042 is provided in the fixture frame 1041. During processing, the cylindrical part is placed in the welding part accommodating space 1042. A welding workbench static support body 1043 and a welding workbench dynamic support fixing assembly 1044 are symmetrically provided on both sides of the fixture frame 1041. The cylindrical part can be positioned in the axial direction by the welding workbench static support body 1043 and the welding workbench dynamic support fixing assembly 1044. A welding workbench 1045 for stir friction welding of the cylindrical part is provided between the welding workbench static support body 1043 and the welding workbench dynamic support fixing assembly 1044. Two clamping mechanisms 1046 for clamping the welding workbench 1045 are symmetrically installed on the top of the fixture frame 1041. The cylindrical part can be positioned and clamped in the radial direction by the clamping mechanism 1046.

[0051] See also Figures 9 to 12As shown, the welding table dynamic support fixing assembly 1044 specifically 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 table dynamic support body 10443 through the welding table dynamic support hinge 10442, and the welding table dynamic support body 10443 is locked by the welding table dynamic support locking mechanism 1047. In this embodiment, when in use, the welding table dynamic support body 10443 is opened, and then the cylindrical part is placed in the welding part accommodating space 1042, and at the same time, the weld of the cylindrical part is upwardly exposed on the welding table 1045, and the cylindrical part is pressed onto the welding table 1045 through the clamping mechanism 1046, and then the welding table dynamic support body 10443 is closed, and finally the welding table dynamic support body 10443 is locked by the welding table dynamic support locking mechanism 1047.

[0052] See also Figures 9 to 12 As shown, the dynamic support locking mechanism 1047 of the welding workbench includes a locking positioning groove 10471 provided at the end of the dynamic support body 10443 of the welding workbench, 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 (in this embodiment, three locking positioning holes 10473 are provided), and a locking connecting rod 10474 is matched with the locking positioning hole 10473. When in use, the locking positioning groove 10471 is clamped into the locking positioning block 10472, and then the locking connecting rod 10474 is inserted into the locking positioning hole 10473, and the dynamic support body 10443 of the welding workbench is fixedly locked by the positioning cooperation of the locking connecting rod 10474 and the locking positioning hole 10473.

[0053] See also Figures 9 to 12As shown, the welding workbench 1045 specifically includes a welding workbench body 10451, and a welding workbench support slot 10452 is provided on one side of the welding workbench body 10451 close to the welding workbench dynamic support fixing assembly 1044. When in use, the welding workbench dynamic support fixing assembly 1044 (specifically, the inner side of the welding workbench dynamic support body 10443 is clamped in the welding workbench support slot 10452) is clamped in the welding workbench support slot 10452. The side of the welding workbench body 10451 close to the welding workbench static support body 1043 is connected to the welding workbench static support body 1043 through the static support end axial positioning assembly 1048. A welding gap 10453 matching with the welding parts is provided on the top of the welding workbench body 10451. In this embodiment, the inner side of the dynamic support body 10443 of the welding table is clamped in the support clamping groove 10452 of the welding table, and the side of the welding table body 10451 opposite to the dynamic support fixing assembly 1044 of the welding table is limited by the axial positioning assembly 1048 of the static support end. In this embodiment, the cylindrical part is mounted on the welding table 1045, and the two sides of the axial weld of the cylindrical part are pressed onto the welding table 1045 by the clamping mechanism 1046. At the same time, the axial positioning of the cylindrical part can be achieved by the welding table 1045, the static support body 1043 of the welding table, the dynamic support body 10443 of the welding table and the square steel at the bottom (not shown in the figure).

[0054] See also Figures 9 to 12As shown, the static support end axial positioning assembly 1048 specifically 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, and 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, and the static support end second axial positioning block 10482 is connected to the welding workbench 1045 through the static support end positioning adjustment hole 10483. A dynamic support end axial positioning assembly 1049 is arranged on one side of the welding workbench 1045 near the dynamic support fixing assembly 1044 of the welding workbench, and the dynamic support end axial positioning assembly 1049 includes a dynamic support end first axial positioning block 10491, and the dynamic support end first axial positioning block 10491 is fixedly connected to one side of the welding workbench 1045, and two symmetrical dynamic support end second axial positioning blocks 10492 are arranged on the inner side of the dynamic support end first axial positioning block 10491, and a dynamic support end workpiece axial movable positioning block 10494 is connected to the top of the clamp frame 1041 through the dynamic support end positioning adjustment hole 10493, and the dynamic support end workpiece axial movable positioning block 10494 cooperates with the dynamic support end second axial positioning block 10492. In this embodiment, before welding, after placing the cylindrical part into the welding part accommodating space 1042, the dynamic support body 10443 of the welding table is closed and locked by the dynamic support locking mechanism 1047 of the welding table, and then the welding table 1045 is fixed to it by the fixing nut in the static support end positioning adjustment hole 10483 on the second axial positioning block 10482 of the static support end, so that the cylindrical part is positioned close to the static support end, and then the welding table 1045 is fixed by the second axial positioning block 10492 of the dynamic support end, and finally the second axial positioning block 10492 of the dynamic support end is fixed by adjusting the dynamic support end positioning adjustment hole 10493 on the axial movable positioning block 10494 of the dynamic support end workpiece. In this way, the cylindrical part is further axially positioned and fixed by the static support end axial positioning assembly 1048 and the dynamic support end axial positioning assembly 1049.

[0055] See also Fig.11As shown, the 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 clamping jaw 10463 is connected to the other end of the clamping mechanism body 10461. An oblique guide groove 10464 is provided on the inner side of the clamping mechanism body 10461, and both ends of the clamping jaw 10463 are embedded in the oblique 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 oblique guide groove 10464. In this embodiment, the two clamping mechanisms 1046 are installed symmetrically. When in use, the clamping hydraulic cylinder 10462 is used to drive the clamping jaws 10463 to move relative to each other. At this time, the clamping jaws 10463 will move obliquely downward along the oblique guide groove 10464 to clamp the cylindrical parts. In this way, the radial positioning and clamping of the cylindrical parts are achieved through the oblique downward clamping force of the clamping mechanism 1046.

[0056] In this embodiment, the axial positioning of the cylindrical part can be achieved through 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, and the radial positioning and clamping of the cylindrical part can be achieved through the clamping mechanism 1046, thereby ensuring the accuracy of the installation position of the cylindrical part, thereby ensuring the accuracy and stability of the welding of the cylindrical part weld.

[0057] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0058] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A friction stir welding device for axial welds of cylindrical parts, comprising a support base (700), characterized in that: A fixture drive assembly (200) is fixedly mounted on the support base (700), and a double-station fixture assembly (100) is connected to the fixture drive assembly (200); a support column (300) is arranged on one side of the support base (700), a Z-axis drive assembly (400) is mounted on the support column (300), an X-axis drive assembly (500) is mounted on the Z-axis drive assembly (400), and a friction stir welding machine (600) is mounted on the X-axis drive assembly (500).

2. The device for friction stir welding of axial welds of cylindrical parts according to claim 1, characterized in that: The clamp driving assembly (200) comprises a clamp moving guide rail (201), a clamp driving oil cylinder (202) and a clamp positioning support cylinder (203); the clamp moving guide rail (201) is fixedly mounted on a support base (700) along the X direction; the clamp driving oil cylinder (201) is used to drive the double-station clamp assembly (100) to move along the X direction; and the clamp positioning support cylinder (203) is used to position the movement of the double-station clamp assembly (100).

3. The device for friction stir welding of axial welds of cylindrical parts according to claim 2, characterized in that: The Z-axis drive assembly (400) comprises a Z-axis motion guide rail (401), a Z-axis drive lead screw (402) and a Z-axis drive motor (403); the Z-axis motion guide rail (401) and the Z-axis drive lead screw (402) are fixedly mounted on a support column (300), the Z-axis drive motor (403) is fixedly connected to one end of the Z-axis drive lead screw (402), and the Z-axis drive motor (403) drives the X-axis drive assembly (500) and the friction stir welding machine (600) to move in the Z direction along the Z-axis guide rail (401).

4. The device for friction stir welding of axial welds of cylindrical parts according to claim 3, characterized in that: The Z-axis driving assembly (400) further comprises a Z-axis balancing cylinder (404), wherein the Z-axis balancing cylinder (404) is arranged on one side of the Z-axis driving motor (403), and the Z-axis balancing cylinder (404) is used to balance the weight of the X-axis driving assembly (500) and the friction stir welding machine (600).

5. The device for friction stir welding of axial welds of cylindrical parts according to claim 1, characterized in that: The X-direction drive assembly (500) comprises an X-direction drive mounting plate (501), a Z-axis motion slider (502) is fixedly connected to the bottom of the X-direction drive mounting plate (501), the Z-axis motion slider (502) is slidably connected to the Z-axis motion guide rail (401), an X-axis motion guide rail (503) is mounted on the X-direction drive mounting plate (501), an X-axis drive lead screw (504) is mounted on the X-direction drive mounting plate (501), and an X-axis drive motor (505) is connected to one end of the X-axis drive lead screw (504).

6. The device for friction stir welding of axial welds of cylindrical parts according to claim 1, characterized in that: The friction stir welding machine (600) comprises a friction welding machine main shaft mounting turntable (603), a friction welding machine main shaft angle adjustment bolt (604) is arranged on the side of the friction welding machine main shaft mounting turntable (603), a friction welding machine main shaft box (608) is fixedly installed on the friction welding machine main shaft mounting turntable (603), a friction welding machine main shaft (609) is arranged in the friction welding machine main shaft box (608), and a friction stir welding head (6010) is arranged at the end of the friction welding machine main shaft (609).

7. The device for friction stir welding of axial welds of cylindrical parts according to claim 6, characterized in that: A friction welding machine main shaft motor (606) is fixedly connected to one end of the friction welding machine main shaft (609) opposite to the friction stir welding head (6010); the friction welding machine main shaft motor (606) is connected to the friction welding machine main shaft (609) via a friction welding machine main shaft coupling (607); and the friction welding machine main shaft motor (606) is fixedly connected to a friction welding machine main shaft box (608) via a friction welding machine main shaft mounting frame (6011).

8. The device for friction stir welding of axial welds of cylindrical parts according to claim 6, characterized in that: A plurality of waist-shaped adjustment holes (6012) are arranged near the edge of the friction welding machine spindle mounting turntable (603), and a friction welding machine spindle angle adjustment locking nut (605) is arranged on the waist-shaped adjustment hole (6012).

9. The device for friction stir welding of axial welds of cylindrical parts according to claim 6, characterized in that: A welding machine mounting plate (601) is connected to the bottom of the friction welding machine spindle mounting turntable (603), an X-axis motion slider (602) is fixedly mounted on the bottom of the welding machine mounting plate (601), and the X-axis motion slider (602) is slidably connected to the X-axis driving assembly (500).

10. The device for friction stir welding of axial welds of cylindrical parts according to claim 1, characterized in that: The double-station fixture assembly (100) comprises a fixture mounting plate (101), a plurality of fixture moving slide blocks (102) are fixedly mounted on the bottom of the fixture mounting plate (101), and the fixture moving slide blocks (102) are slidably connected to the fixture driving assembly (200); a fixture driving cylinder piston mounting plate (103) is fixedly mounted on one end of the fixture mounting plate (101), and the fixture driving cylinder (201) is fixedly connected to the fixture driving cylinder piston mounting plate (103); and at least two welding fixtures (104) are mounted on the fixture mounting plate (101).

11. The device for friction stir welding of axial welds of cylindrical parts according to claim 10, characterized in that: The welding fixture (104) comprises a fixture frame (1041), a welding parts accommodating space (1042) is arranged in the fixture frame (1041), and 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 workpiece on the welding workbench (1045) are symmetrically installed on the top of the fixture frame (1041).

12. The device for friction stir welding of axial welds of cylindrical parts according to claim 10, characterized in that: The welding workbench dynamic support fixing assembly (1044) comprises a dynamic support mounting plate (10441) fixedly mounted on a clamp frame (1041); the dynamic support mounting plate (10441) is rotatably connected to a dynamic support body (10443) of the welding workbench via a dynamic support hinge (10442) of the welding workbench; and the dynamic support body (10443) of the welding workbench is locked via a dynamic support locking mechanism (1047) of the welding workbench.

13. The device for friction stir welding of axial welds of cylindrical parts according to claim 10, characterized in that: The welding workbench (1045) comprises a welding workbench body (10451), and a welding workbench support slot (10452) is provided on one side of the welding workbench body (10451) close to the welding workbench dynamic support fixing assembly (1044). When in use, the welding workbench dynamic support fixing assembly (1044) is clamped in the welding workbench support slot (10452); the side of the welding workbench body (10451) close to the welding workbench static support body (1043) is connected to the welding workbench static support body (1043) through the static support end axial positioning assembly (1048); and a gap (10453) for accommodating welding parts is reserved at the top of the welding workbench body (10451).

14. The device for friction stir welding of axial welds of cylindrical parts according to claim 13, characterized in that: The static support end axial positioning assembly (1048) includes a first axial positioning block (10481) of the static support end, and the first axial positioning block (10481) of the static support end is clamped on the top of the static support body (1043) of the welding workbench, and two symmetrical second axial positioning blocks (10482) of the static support end are fixedly connected to the bottom of the first axial positioning block (10481) of the static support end, and the second axial positioning block (10482) of the static support end is connected to the welding workbench (1045) through the static support end positioning adjustment hole (10483).

15. The device for friction stir welding of axial welds of cylindrical parts according to claim 11, characterized in that: A dynamic support end axial positioning assembly (1049) is arranged on one side of the welding workbench (1045) close to the dynamic support fixing assembly (1044) of the welding workbench, and the dynamic support end axial positioning assembly (1049) includes a dynamic support end first axial positioning block (10491), and the dynamic support end first axial positioning block (10491) is fixedly connected to one side of the welding workbench (1045), and two symmetrical dynamic support end second axial positioning blocks (10492) are arranged on the inner side of the dynamic support end first axial positioning block (10491), and a dynamic support end workpiece axial movable positioning block (10494) is connected to the top of the clamp frame (1041) through the dynamic support end positioning adjustment hole (10493), and the dynamic support end workpiece axial movable positioning block (10494) cooperates with the dynamic support end second axial positioning block (10492).

16. The device for friction stir welding of axial welds of cylindrical parts according to claim 12, characterized in that: The welding workbench dynamic support locking mechanism (1047) comprises a locking positioning groove (10471) arranged at the end of the welding workbench dynamic 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) are arranged on the locking positioning block (10472), and a locking connecting rod (10474) is matched on the locking positioning hole (10473). When in use, the locking connecting rod (10474) is inserted into the locking positioning hole (10473).

17. The device for friction stir welding of axial welds of cylindrical parts according to claim 11, characterized in that: Each clamping mechanism (1046) includes a clamping mechanism body (10461), one end of which is fixedly connected to a clamping hydraulic cylinder (10462), and the other end of which is connected to a clamping claw (10463).

18. The device for friction stir welding of axial welds of cylindrical parts according to claim 17, characterized in that: An inclined guide groove (10464) is provided on the inner side of the clamping mechanism body (10461), and both 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).

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