A kind of high-voltage switch conductive rod is with friction stir welding device

Abstract

The application relates to a high-voltage switch conductive rod stirring friction welding device. The high-voltage switch conductive rod stirring friction welding device comprises a workpiece clamp for clamping a workpiece to be welded, and further comprises a stirring friction welding machine for welding the annular weld; the workpiece clamp can drive the workpiece to rotate at least one round, or the stirring friction welding machine can rotate at least one round along the annular weld; the workpiece clamp comprises two coaxially arranged chucks, and the two chucks are respectively used for clamping the conductive rod units to be welded; the opposite side of the stirring friction welding machine is provided with a supporting device, the supporting device is provided with a supporting roller set, and the rollers in the supporting roller set form a V-shaped conductive rod supporting groove to rollingly support the outer circumferential surface of the conductive rod unit; the supporting device and the stirring friction welding machine are fixedly arranged relative to the workpiece clamp for driving the workpiece to rotate, or the supporting device is fixedly arranged relative to the stirring friction welding machine to synchronously rotate with the stirring friction welding machine around the annular weld.

Description

Technical Field

[0001] This invention relates to welding of the rod body to the connector or rod body to rod body in a high-voltage switch conductive rod, and more specifically to a friction stir welding apparatus for welding the rod body to the connector or rod body to rod body in a conductive rod. Background Technology

[0002] Currently, high-voltage switchgear requires busbars to achieve conductive connections for corresponding equipment. Insulating basins are installed at both ends of the busbar, with conductive inserts on these basins. Connecting seats for connecting corresponding conductive rods are mounted on the conductive inserts. The conductive rod consists of a rod body and connectors, which are often fixed by welding. During welding, the coaxiality of the rod body and connectors must be ensured to guarantee a reliable connection between the conductive rod ends and the connecting seats at both ends of the busbar. To manufacture conductive rods of a certain length, the rod bodies sometimes need to be welded together.

[0003] Currently, the welding method for conductive rod units generally employs traditional argon arc welding technology. This method is prone to defects such as porosity and tungsten inclusions in the weld, and the welding process generates toxic and harmful substances, causing environmental pollution. In recent years, environmental pollution has become severe, and the government has intensified its environmental governance efforts, implementing production restrictions on technologies and processes that cause pollution. Therefore, fusion welding technology is also subject to environmental protection-related production restrictions. These restrictions will lead to a decrease in component production capacity, longer assembly cycles, and impact on product assembly.

[0004] Compared to traditional fusion welding, friction stir welding is a solid-state joining process. It does not require filler material or shielding gas, and produces no arc radiation, gas fumes, welding spatter, or noise. It boasts a high degree of automation, requires minimal operator skill and training, and offers advantages such as stable weld quality, high repeatability, excellent mechanical properties, and high efficiency. It is widely used in industries such as aerospace and rail transportation. For example, Chinese patent document CN104759750B discloses a friction stir welding mechanism for pipeline steel annular welds, capable of welding oil pipes using friction stir welding. In this mechanism, the friction stir welding machine rotates around the oil pipe, while the oil pipe remains stationary. Chinese patent application CN105226479A discloses a method for preparing a tubular conductive rod, a hydraulic bulging device, and a method for welding the tubular conductive rod using a friction stir welding device; however, it does not disclose the specific equipment.

[0005] Currently, for friction stir welding, the friction stir device applies a certain pressure to the workpiece to achieve the connection of the workpiece's circumferential weld. Under the action of pressure, the weld is prone to wobble, which causes the spacing of the circumferential weld to deviate at various points. It is difficult to ensure that the size of the circumferential weld is uniform, which in turn leads to the deviation of the coaxiality of the conductive rod units to be welded on both sides of the circumferential weld, and fails to meet the requirement of high coaxiality of the conductive rod. Summary of the Invention

[0006] The purpose of this invention is to provide a friction stir welding device for high-voltage switch conductive rods, so as to solve the technical problem that the spacing of the annular weld seam processed by the existing friction stir welding device is deviated and cannot meet the requirement of high coaxiality of the conductive rod.

[0007] To achieve the above objectives, the technical solution of the friction stir welding device for high-voltage switch conductive rods of the present invention is as follows:

[0008] A friction stir welding apparatus for high-voltage switch conductive rods includes a workpiece clamp for clamping workpieces to be welded so that the butt joints of the workpieces form an annular weld, and a friction stir welding machine for welding the annular weld. The workpiece clamp is capable of rotating the workpiece at least one revolution, or the friction stir welding machine is capable of rotating at least one revolution along the annular weld. The workpiece clamp includes two coaxially arranged chucks, each used to clamp a conductive rod unit to be welded. A support device is provided on opposite sides of the friction stir welding machine, and a support roller assembly is provided on the support device. The rollers in the support roller assembly form a V-shaped conductive rod support groove, which provides rolling support to the outer circumferential surface of the conductive rod unit to balance the pressure of the friction stir welding machine on the conductive rod unit. Both the support device and the friction stir welding machine are fixedly arranged relative to the workpiece clamp for rotating the workpiece, or the support device is fixedly arranged relative to the friction stir welding machine to rotate synchronously with the friction stir welding machine around the annular weld.

[0009] The beneficial effects are as follows: In the high-voltage switch conductive rod friction stir welding device of the present invention, two coaxially arranged chucks can clamp the conductive rod units to be welded. The friction stir welding machine is used to weld the annular weld formed by the two conductive rod units. A support roller assembly is provided on the support device located on the opposite side of the friction stir welding machine. The V-shaped conductive rod support groove formed by the rollers in the support roller assembly supports the outer circumferential surface of the conductive rod unit to balance the pressure of the friction stir welding machine on the conductive rod unit. The chucks, friction stir welding machine, and support device rotate relative to each other at least once in the circumferential direction of the annular weld to weld the annular weld. During the welding process of the conductive rod unit, the support device supports the conductive rod unit to balance the pressure of the friction stir welding machine on the conductive rod unit, avoiding the annular weld from swaying under unbalanced force, reducing the spacing deviation at various points of the annular weld, and improving the coaxiality of the conductive rod.

[0010] In a further improvement, the chuck is provided with a mounting hole that runs through the chuck along its axial direction, through which the conductive rod unit to be welded is inserted; the friction stir welding device for high-voltage switch conductive rods also includes a support seat arranged along the axial direction of the chuck, and the support seat is located on the side of the chuck away from the other chuck to support the overhang of the conductive rod unit.

[0011] The beneficial effects are: the relative rotation of the conductive rod unit and the stirring head in the circumferential direction is achieved by rotating the chuck, avoiding the rotation of the stirring device and the support device in the circumferential direction of the chuck, thus simplifying the structure of the device; the mounting holes on the chuck allow the slender conductive rod unit to pass through the mounting holes and be clamped on the chuck, increasing the application range of the welding device; the support base supports the overhang of the slender conductive rod unit, preventing the conductive rod unit from bending due to excessive length, which would affect the coaxiality of the conductive rod unit and thus the coaxiality of the conductive rod.

[0012] Further improvements include a rotatable chuck with a support base equipped with a roller assembly. The rollers of the roller assembly form a V-shaped structure to provide rolling support for the conductive rod unit to be welded.

[0013] The beneficial effects are: with this design, the roller group rolls to support the rotating conductive rod unit, the friction between the roller group and the conductive rod unit is small, reducing the impact of friction on the rotation speed of the two conductive rod units, thereby improving the synchronous rotation of the two conductive rod units.

[0014] Further improvements include an adjustable support base to accommodate conductive rod units of different diameters.

[0015] The beneficial effect is that this design allows the height of the cantilever end of the conductive rod unit to be adjusted by adjusting the height of the lifting frame, thus ensuring that both ends of the conductive rod unit are on the same horizontal line.

[0016] Further improvements include setting the support base along the axial direction of the chuck.

[0017] The beneficial effects are: this design allows the position of the conductive rod unit to be adjusted by moving the support base, thereby achieving the docking of the two conductive rod units, improving the automation of the friction stir welding device and reducing the intensity of manual labor.

[0018] Further improvements include the provision of two sets of support rollers, arranged along the axial direction of the chuck, to support the two conductive rod units on both sides of the annular weld seam respectively.

[0019] The beneficial effect is that, with this design, the two sets of supporting rollers support the conductive rod units on both sides of the annular weld seam respectively, so as to better balance the pressure of the stirring head on the corresponding conductive rod units.

[0020] Further improvements include setting the support device in a direction that guides the support device and the friction stir welding machine in opposite directions.

[0021] The beneficial effect is that this design allows the position of the support roller assembly relative to the conductive rod unit to be adjusted through the guiding movement of the support device, so that the support roller assembly can be adapted to conductive rod units of different sizes.

[0022] In a further improvement, the support roller assembly is guided and assembled on the support device body along the relative direction of the support device and the friction stir welding machine, and the guide stroke of the support roller assembly is less than the guide stroke of the support device.

[0023] The beneficial effects are: this design allows for direct fine-tuning of the support roller assembly to ensure it fits snugly against the conductive rod unit, improving the adjustment accuracy of the support roller assembly, and the support roller assembly is small in size and easy to operate.

[0024] Further improvements include arranging the support device and friction stir welding machine in a horizontal direction.

[0025] The beneficial effects are: the support device and the friction stir welding machine are arranged in a horizontal direction, and the operating mechanisms of both are not limited by space, making it convenient for operators to operate.

[0026] Further improvements include a main head for holding the stirring head on the friction stir welding machine, which has a milling cutter clamping function, enabling the stirring head to be disassembled and clamped for milling the flash formed by friction stir welding.

[0027] The beneficial effects are: with this design, the friction stir welding machine integrates welding and milling functions, reducing the number of assembly steps and improving production efficiency. Attached Figure Description

[0028] Figure 1 This is a front view of the friction stir welding apparatus for the high-voltage switch conductive rod of the present invention;

[0029] Figure 2 for Figure 1 Top view;

[0030] Figure 3 for Figure 1 The left view;

[0031] Figure 4 for Figure 1 Schematic diagram of the middle chuck;

[0032] Figure 5 for Figure 4 The right view;

[0033] Figure 6 for Figure 1 Schematic diagram of the middle support base;

[0034] Figure 7 for Figure 6 The right view;

[0035] Figure 8 for Figure 1 Schematic diagram of the middle support device;

[0036] Figure 9 for Figure 8 Top view;

[0037] Figure 10 for Figure 8 Side view;

[0038] In the diagram: 11. Chuck; 12. Frame; 13. Support base; 14. Friction stir welding machine; 15. Welding machine guide rail; 16. Main head; 17. Support device; 18. Support roller assembly; 19. Clamping cylinder; 20. Feed guide rail; 21. Conductive rod unit; 22. Support device body; 23. Movable rod; 24. Fixed sleeve; 25. Lead screw; 26. Adjusting handwheel; 27. Brake handle; 28. Linear slide rail; 29. ​​Lifting slide rail; 30. Soft material; 31. Pneumatic system; 32. Support roller assembly; 33. Servo motor; 34. Lifting cylinder; 35. Outer movable frame; 36. Inner lifting frame. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0041] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the process or method that includes said element.

[0042] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the main body, or it can be separately arranged from the main body and connected to the main body. This connection can be a detachable connection or a non-detachable connection. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0044] The present invention will be further described in detail below with reference to the embodiments.

[0045] Example 1 of the friction stir welding apparatus for high-voltage switch conductive rods of the present invention:

[0046] In this embodiment, the friction stir welding device for the high-voltage switch conductive rod is suitable for butt welding of joints with circular cross-sections to the rod body or for butt welding of rod bodies to rod bodies. For example... Figures 1 to 5 As shown, the friction stir welding device for high-voltage switch conductive rods includes a frame 12, two coaxially arranged chucks 11, a friction stir welding machine 14, and a support device 17. The friction stir welding machine 14 and the support device 17 are arranged horizontally and opposite to each other along the axis of the chucks 11. The frame 12 adopts a high-strength, rigid box-beam welded structure. A servo motor 33 and a pneumatic system 31 are mounted on the frame 12. The pneumatic system 31 drives the chucks 11 to tighten and clamp the conductive rod unit 21 to be welded. A gear disk is connected to the output shaft of the servo motor 33. The gear disk is rotated between the chucks 11 and the servo motor 33 to drive the two chucks 11 to rotate synchronously around their axes. The chucks 11 are used to clamp the conductive rod unit 21 to be welded. To prevent the chucks 11 from damaging the outer surface of the conductive rod unit 21, a soft material 30 is installed on the contact surface between the chucks 11 and the conductive rod unit 21. The chuck 11 is also provided with a mounting hole that extends through the axial direction of the chuck 11. When the conductive rod unit 21 to be welded is a slender structure, the conductive rod unit 21 can pass through the mounting hole and be fixed on the chuck 11. The friction stir welding device for the integral high-voltage switch conductive rod is an open design, which facilitates the installation and disassembly of the conductive rod unit 21. In this embodiment, the chuck 11 is a three-jaw self-centering design. The chuck 11 is a relatively mature technology in the prior art, and its structure will not be described in detail here.

[0047] In this embodiment, as Figures 1 to 3 As shown, the friction stir welding device for high-voltage switch conductive rods includes a feed guide rail 20 extending axially along the chuck 11. Two support seats 13 are provided on the side of one chuck 11 away from the other chuck 11. The support seats 13 are used to support the overhang of the conductive rod unit 21 to prevent the conductive rod unit 21 from bending due to excessive length, which would cause the two ends of the conductive rod unit 21 to not be on the same horizontal line, thereby affecting the coaxiality of the conductive rod unit 21.

[0048] In this embodiment, as Figures 1 to 3 As shown, all support seats 13 are guided and slidably fitted with the feed guide rail 20. Figure 6 and Figure 7 As shown, the support base 13 includes an outer movable frame 35 and an inner lifting frame 36. The inner lifting frame 36 is provided with a roller assembly 32, in which a V-shaped groove is formed between the rollers to provide rolling support for the outer surface of the conductive rod unit 21. The inner lifting frame 36 is also provided with a clamping roller assembly and a clamping cylinder 19. The clamping cylinder 19 is used to drive the clamping roller assembly to clamp the V-shaped groove to clamp the outer surface of the conductive rod unit 21, preventing the conductive rod unit 21 from swaying during rotation and affecting the coaxiality of the conductive rod.

[0049] In this embodiment, as Figure 6 and Figure 7 As shown, the outer movable frame 35 slides and guides the feed guide rail 20. When the conductive rod unit 21 to be welded is placed on the support roller assembly 32, the movement of the outer movable frame 35 on the feed guide rail 20 enables the automated docking of the conductive rod unit 21. Furthermore, the outer movable frame 35 is a height-adjustable movable frame to accommodate conductive rod units 21 of different diameters, ensuring that the heights of both ends of the conductive rod unit 21 are on the same horizontal line. The inner lifting frame 36 has a lifting cylinder 34 and a lifting slide rail 29 extending vertically. The outer movable frame 35 has a slide rail that cooperates with the lifting slide rail 29. The lifting cylinder 34 can drive the inner lifting frame 36 to rise and fall via the lifting slide rail 29. The lifting stroke of the inner lifting frame 36 is less than that of the outer movable frame 35, allowing for fine-tuning of the height of the support roller assembly 32, and consequently, fine-tuning of the height of the conductive rod unit 21.

[0050] In this embodiment, as Figure 2 and Figure 3As shown, the friction stir welding machine 14 includes a main head 16 and a centering mechanism. The bottom of the friction stir welding machine 14 is provided with a welding machine guide rail 15 extending in the front-to-back direction. The friction stir welding machine 14 slides and guides with the welding machine guide rail 15 to drive the main head 16 close to the annular weld seam of the two conductive rod units 21 to be welded. The main head 16 can clamp a stirring head and a milling cutter head. The stirring pin of the stirring head is used for welding the annular weld seam. The main head 16 adds a fine-tuning function along the axial direction of the conductive rod unit 21, so that the center line of the stirring head is aligned with the annular weld seam, thereby using the frictional heat generated by the high-speed rotating stirring pin to melt the material at the annular weld seam. The axial direction of the stirring head has a certain angle of inclination with the normal direction of the annular weld seam. The inclination angle of the stirring head is generally between ±2.5° to ensure that the stirring head transfers the material stirred by the stirring pin from the front to the back of the stirring head and applies pressure to shape it. The milling cutter on the milling head is used to mill the burrs at the circumferential weld, enabling the friction stir welding machine 14 to integrate welding and milling functions, reducing assembly times and improving production efficiency. The friction stir welding machine 14 is a relatively mature technology in the prior art and will not be described in detail here. In this embodiment, the tilt angle of the stirring head is 2.5°, which results in a more aesthetically pleasing weld formation.

[0051] In this embodiment, as Figures 8 to 10 As shown, the friction stir welding device for high-voltage switch conductive rods includes a linear slide rail 28 extending in the front-to-back direction, and a support device 17 is guided and mounted on the linear slide rail 28. The support device 17 includes a support device body 22 and a set of support rollers 18 guided and mounted on the support device body 22. The support device body 22 and the linear slide rail 28 are guided and slidably engaged to adjust the position of the support rollers 18. Two sets of support rollers 18 are provided, each set of support rollers 18 being arranged on both sides of the annular weld of the conductive rod unit 21 to be welded. The rollers in each set of support rollers 18 form a V-shaped support groove for the conductive rod unit 21 to roll and support the outer circumference of the conductive rod unit 21, thereby balancing the pressure of the friction stir welding machine 14 on the conductive rod unit 21, preventing the conductive rod unit 21 from swaying and increasing the spacing error at each point of the annular weld, thus affecting the coaxiality of the conductive rod unit 21. Moreover, the height of the support rollers 18 is the same as the center height of the chuck 11, so the support device 17 does not need to adjust the height of the support rollers 18 during operation.

[0052] In this embodiment, as Figures 8 to 10As shown, the support roller assembly 18 is guided and slidably mounted on the support device body 22 in the front-to-back direction. A fixed sleeve 24 is fixed to the upper end of the support device body 22, and a movable rod 23 passes through the fixed sleeve 24. The support roller assembly 18 is fixed to the movable rod 23. One end of a lead screw 25 passes through the fixed sleeve 24 and is threadedly engaged with the movable rod 23 to form a lead screw and nut structure. An adjusting handwheel 26 is installed at the other end of the lead screw 25. Thus, the rotation of the adjusting handwheel 26 converts the rotational motion into linear motion of the movable rod 23 through the lead screw and nut structure, thereby driving the support roller assembly 18 closer to or further away from the conductive rod unit 21. A brake handle 27 is installed on the outer circumference of the fixed sleeve 24 to lock the movable rod 23 after the support roller assembly 18 has moved to its designated position. The travel distance of the support roller assembly 18 is less than the travel distance of the support device 17 on the linear guide rail 28.

[0053] When the connector and the rod body need to be aligned, the conductive high-voltage switch conductive rod is operated by a friction stir welding device. The connector and the rod body are respectively fixed on the chuck 11 through the mounting holes. The overhanging end of the rod body is placed on the roller group 32 of the support seat 13. The support seat 13 moves on the feed guide rail 20 to align the rod body with the connector. Then, the chuck 11 clamps the rod body. Adjust the height of the outer movable frame 35 or the inner lifting frame 36 so that the two ends of the conductive rod unit 21 to be welded are at the same horizontal line as the clamping part. After adjustment, the clamping cylinder 19 is activated to clamp the outer surface of the rod body with the clamping roller group. The friction stir welding machine 14 moves along the welding machine guide rail 15 and adjusts the main head 16 so that the center line of the stirring head is aligned with the annular weld of the conductive rod unit 21. The support device 17 moves along the linear slide rail 28 to approach the conductive rod unit 21 to be welded. Then, the adjusting handwheel 26 is rotated to fine-tune the position of the support roller assembly 18, so that the support roller assembly 18 is close to the outer surface of the conductive rod unit 21 to be welded, and the brake handle 27 is locked. The two chucks 11 rotate synchronously to drive the joint and the rod body to rotate synchronously for one revolution. At the same time, the main head 16 drives the stirring head to rotate at high speed and controls the pressing amount of the stirring head to complete the welding of the annular weld between the joint and the rod body. Finally, the stirring head is replaced with a milling cutter head, the conductive rod unit 21 rotates to complete the milling of the annular weld burrs, and the clamping of the conductive rod unit 21 is released, thus completing the connection between the joint and the rod body.

[0054] In the high-voltage switch conductive rod welding device of the present invention, two coaxially arranged chucks can clamp the conductive rod units to be welded. The friction stir welding machine is used to weld the annular weld formed by the two conductive rod units. A support roller assembly is provided on the support device located on the opposite side of the friction stir welding machine. The V-shaped conductive rod support groove formed by the rollers in the support roller assembly supports the outer circumferential surface of the conductive rod unit to balance the pressure of the friction stir welding machine on the conductive rod unit. The chucks, the friction stir welding machine, and the support device rotate relative to each other at least once in the circumferential direction of the annular weld to weld the annular weld. During the welding process of the conductive rod unit, the support device supports the conductive rod unit to balance the pressure of the friction stir welding machine on the conductive rod unit, avoids the annular weld from swaying under unbalanced force, reduces the spacing deviation at various points of the annular weld, and improves the coaxiality of the conductive rod.

[0055] Embodiment 2 of the friction stir welding apparatus for high-voltage switch conductive rods of the present invention:

[0056] The difference between this embodiment and Embodiment 1 is as follows: In Embodiment 1, the chuck 11 has a mounting hole extending along the axial direction of the chuck 11, and each of the two chucks 11 has two support seats 13 on the side away from the other chuck 11. All support seats 13 are arranged along the axial direction of the chuck 11 to support the overhanging portion of the conductive rod unit 21 to be welded. In this embodiment, the mounting hole on the chuck is omitted. In this case, the two chucks can only clamp conductive rod units with shorter lengths. For example, connectors and joints. In other embodiments, the chuck has a mounting hole extending along the axial direction of the chuck, and only one of the two chucks has a support seat on the side away from the other chuck to support the overhanging portion of the conductive rod unit to be welded. In this case, one chuck can clamp relatively shorter conductive rod units, and the other chuck can clamp relatively longer conductive rod units. For example, connectors and rods.

[0057] Embodiment 3 of the friction stir welding apparatus for high-voltage switch conductive rods of the present invention:

[0058] The difference between this embodiment and Embodiment 1 is as follows: In Embodiment 1, the chuck 11 is a rotatable chuck, and the support base 13 is provided with a roller assembly 32. The rollers of the roller assembly 32 form a V-shaped structure to roll and support the conductive rod unit 21 to be welded. In this embodiment, the chuck is a rotatable chuck, and the support base is provided with a support groove with a circular cross-section. The support groove is used to support the conductive rod unit to be welded. In other embodiments, the chuck is a fixed chuck. To achieve relative rotation between the chuck and the friction stir welding machine, the friction stir welding machine and the support device are mounted on a rotary frame. The rotary frame rotates relative to the chuck through a rotary drive assembly. The rotary drive assembly includes an external gear ring, a rotary drive motor, and a rotary drive gear. The external gear ring is coaxially arranged with the chuck. The rotary drive motor is fixedly mounted on the rotary frame. The rotary drive gear is fixedly mounted on the motor shaft of the rotary drive motor. The rotary drive gear meshes with the external gear ring to drive the friction stir welding machine and the support device on the rotary frame to rotate synchronously around the axis of the chuck at least one revolution. At this time, the support base can be exempted from the installation of the roller assembly.

[0059] Embodiment 4 of the friction stir welding apparatus for high-voltage switch conductive rods of the present invention:

[0060] The difference between this embodiment and Embodiment 1 is as follows: In Embodiment 1, the support base 13 includes an outer movable frame 35 and an inner lifting frame 36. The outer movable frame 35 is guided along the vertical direction, and the bottom of the inner lifting frame 36 is provided with a lifting slide rail 29 extending along the vertical direction, which is slidably assembled onto the outer movable frame 35 to achieve adjustment of the support height. In this embodiment, the outer movable frame is fixed along the vertical direction, and the inner lifting frame is slidably assembled onto the outer movable frame along the vertical direction. In other embodiments, the inner lifting frame is fixed, and the outer movable frame is guided along the vertical direction.

[0061] Embodiment 5 of the friction stir welding apparatus for high-voltage switch conductive rods of the present invention:

[0062] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the bottom of the support base 13 is provided with a feed guide rail 20 extending along the axial direction of the chuck 11, and the support base 13 is slidably guided onto the feed guide rail 20. In this embodiment, rollers are installed at the bottom of the support base to enable the support base to move along the axial direction of the chuck.

[0063] Embodiment 6 of the friction stir welding apparatus for high-voltage switch conductive rods of the present invention:

[0064] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, two sets of support rollers 18 are provided, and the two sets of support rollers 18 are arranged along the axial direction of the chuck 11 and are respectively used to support the conductive rod units 21 to be welded on both sides of the annular weld to be processed. In this embodiment, only one set of support rollers is provided. This set of support rollers is used to align and roll to support the annular weld to be processed, so as to balance the pressure of the friction stir welding machine on the conductive rod units.

[0065] Embodiment 7 of the friction stir welding apparatus for high-voltage switch conductive rods of the present invention:

[0066] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the support device 17 is guided and mounted on a linear slide rail 28 extending in the front-to-back direction. In this embodiment, the bottom of the support device is provided with rollers to adjust the position of the support device.

[0067] Example 8 of the friction stir welding apparatus for high-voltage switch conductive rods of the present invention:

[0068] The difference between this embodiment and Embodiment 1 is as follows: In Embodiment 1, a fixed sleeve 24 is fixed to the upper end of the support device body 22, a movable rod 23 is installed inside the fixed sleeve 24, the support roller assembly 18 is fixed on the movable rod 23, one end of the lead screw 25 passes through the fixed sleeve 24 and is threadedly engaged with the movable rod 23 to form a lead screw nut structure, and a brake handle 27 is installed on the outer circumferential surface of the fixed sleeve 24 to lock the movable rod 23 after the support roller assembly 18 has moved into place. In this embodiment, the support roller assembly is fixed on the movable rod, the fixed sleeve is fixed on the support device body, the fixed sleeve is provided with a slide rail adapted to the movable rod, and the outer wall of the fixed sleeve is provided with a limiting hole. When the support roller assembly moves into place, the set screw passes through the limiting hole and is fixed on the movable rod to lock the movable rod.

[0069] Example 9 of the friction stir welding apparatus for high-voltage switch conductive rods of the present invention:

[0070] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the support device 17 and the friction stir welding machine 14 are arranged horizontally. In this embodiment, the support device and the friction stir welding machine are arranged vertically, with the support device located directly below the friction stir welding machine.

[0071] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A friction stir welding apparatus for a high-voltage switch conductor rod, comprising a workpiece clamp for clamping workpieces to be welded so that the butt joint ends of the workpieces form an annular weld, and a friction stir welding machine (14) for welding the annular weld; wherein the workpiece clamp is capable of rotating the workpiece at least one revolution, or the friction stir welding machine (14) is capable of rotating at least one revolution along the annular weld; characterized in that, The workpiece fixture includes two coaxially arranged chucks (11), which are used to clamp the conductive rod unit (21) to be welded. A support device (17) is provided on the opposite side of the friction stir welding machine (14). A support roller group (18) is provided on the support device (17). The rollers in the support roller group (18) form a V-shaped conductive rod support groove. The conductive rod support groove is used to form rolling support on the outer peripheral surface of the conductive rod unit (21) to balance the pressure of the friction stir welding machine (14) on the conductive rod unit (21). The support device (17) and the friction stir welding machine (14) are both fixed relative to the workpiece fixture used to drive the workpiece to rotate, or the support device (17) is fixed relative to the friction stir welding machine (14). 14) Fixed setting to rotate synchronously with the friction stir welding machine (14) around the annular weld seam; the chuck (11) is provided with a mounting hole that runs through the axial direction of the chuck (11), and the mounting hole is for the conductive rod unit (21) to be welded to pass through; the friction stir welding device for high voltage switch conductive rods also includes a support seat (13) arranged along the axial direction of the chuck (11), and the support seat (13) is located on the side of the chuck (11) away from the other chuck (11) to support the overhang of the conductive rod unit (21); the chuck (11) is a rotatable chuck (11), and the support seat (13) is provided with a roller group (32), and the rollers of the roller group (32) form a V-shaped structure to roll and support the conductive rod unit (21) to be welded.

2. The friction stir welding device for high-voltage switch conductive rods according to claim 1, characterized in that, The support base (13) is an adjustable support base (13) to accommodate conductive rod units (21) of different diameters.

3. The friction stir welding device for high-voltage switch conductive rods according to claim 1, characterized in that, The support base (13) is axially guided along the chuck (11).

4. The friction stir welding apparatus for high-voltage switch conductive rods according to any one of claims 1 to 3, characterized in that, The support roller assembly (18) is provided in two sets, which are arranged along the axial direction of the chuck (11) to support the two conductive rod units (21) located on both sides of the annular weld.

5. The friction stir welding apparatus for high-voltage switch conductive rods according to any one of claims 1 to 3, characterized in that, The support device (17) is guided along the relative direction of the support device (17) and the friction stir welding machine (14).

6. The friction stir welding apparatus for high-voltage switch conductive rods according to claim 5, characterized in that, The support roller assembly (18) is guided and assembled on the support device body (22) in the relative direction of the support device (17) and the friction stir welding machine (14), and the guide stroke of the support roller assembly (18) is less than the guide stroke of the support device (17).

7. The friction stir welding apparatus for high-voltage switch conductive rods according to any one of claims 1 to 3, characterized in that, The support device (17) and the friction stir welding machine (14) are arranged in a horizontal direction.

8. The friction stir welding apparatus for high-voltage switch conductive rods according to any one of claims 1 to 3, characterized in that, The main head of the friction stir welding machine (14) used to hold the stirring head has a milling cutter clamping function, which can disassemble the stirring head and clamp it for milling the flash formed by friction stir welding.

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