Friction stir welding follow-up auxiliary device

Abstract

The utility model provides a friction stir welding follow-up auxiliary device, which belongs to the technical field of friction stir welding equipment, and comprises a main shaft, a ring block is arranged at the bottom end of the main shaft, a rotating shaft is arranged at the bottom end of the ring block, a welding head is arranged at the bottom end of the rotating shaft, a fixed clamping block is arranged on the ring block, a movable clamping block is rotatably connected onto the fixed clamping block, and the movable clamping block is provided with a clamping groove. Locking structures are arranged on the fixed clamping block and the movable clamping block, a connecting plate is fixedly connected to the side wall of the outer side of the fixed clamping block, and a pneumatic push rod is fixedly connected to the upper end face of the connecting plate. By means of the assembly plate, the follow-up block, the laser, the beam expander, the vibration lens and the focusing lens, two to-be-welded parts are pressed to be kept on the same horizontal line during welding, meanwhile, the to-be-welded parts can be heated in an auxiliary mode, resistance of the to-be-welded parts is reduced, abrasion of a welding head in the welding process is relieved, the service life of the welding head is prolonged, and production cost is reduced. The problem that in the prior art, auxiliary heating is inconvenient to conduct on a to-be-welded part is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of friction stir welding equipment, and more specifically, to a friction stir welding follow-up auxiliary device. Background Technique

[0002] Friction stir welding (FSW) was invented in 1991 and is an effective solid-state welding process for aluminum alloy welding. In the conventional friction stir welding process, a non-consumable stirring head is rotated and inserted into the butt joint surface of the workpiece. The surrounding area materials are heated to the plastic state by the rotational friction heat of the shoulder and the stirring pin and the metal plastic deformation heat. During welding, the temperature is lower than the melting point. At the same time, the stirring head moves along the weld interface at a certain welding speed, and the thermoplastic materials are continuously transferred from the front of the stirring head to the rear, thus forming a dense weld seam. Compared with the traditional welding method, the friction stir welding process does not require filler materials and shielding gases, the workpieces to be welded do not need to be beveled, the surface treatment requirements are relatively low, there is no need for complex pre-welding pretreatment, and the residual stress and deformation of the post-weld structure are small. The joints will not produce defects such as cracks, pores and alloy element burning loss related to melting. There is no arc radiation, smoke and splash during the welding process, and the noise is low. Therefore, friction stir welding is an economical, efficient and high-quality green welding process.

[0003] After retrieval, in the prior art, the Chinese patent with the patent application number CN202011247697.4 discloses a friction stir welding follow-up auxiliary device, which relates to the technical field of friction stir welding equipment, including a main shaft, a connection mechanism and a pressing plate mechanism. A ring block is arranged at the bottom end of the main shaft, a rotating shaft is arranged at the bottom end of the ring block, a welding head is arranged at the bottom end of the rotating shaft, a chute and a first fixing hole are arranged at one end of the top of the ring block, and the first fixing hole is located on both sides of the chute. The connection mechanism is located at one end of the ring block and is sleeved with the chute, but there are still the following defects:

[0004] (1) In the prior art, the friction stir welding follow-up auxiliary device is inconvenient to assist in heating the workpiece to be welded during the welding process, resulting in increased wear of the welding head and reduced service life;

[0005] (2) In the prior art, the ring block of the friction stir welding follow-up auxiliary device is fixed by multiple bolts, and the installation and disassembly take a long time, which is inconvenient for quickly installing and disassembling the ring block.

[0006] Therefore, we make improvements on this and propose a friction stir welding follow-up auxiliary device. Content of the Utility Model

[0007] The purpose of the utility model is to address the problems that the existing friction stir welding follow-up auxiliary device is inconvenient to assist in heating the workpiece to be welded and inconvenient to quickly install and disassemble the ring block.

[0008] To achieve the above-mentioned utility model purpose, the present utility model provides the following technical solutions:

[0009] A friction stir welding follow-up auxiliary device to improve the above problems.

[0010] The present utility model is specifically as follows:

[0011] It includes a main shaft, a ring block is provided at the bottom end of the main shaft, a rotating shaft is provided at the bottom end of the ring block, a welding head is provided at the bottom end of the rotating shaft, a fixed clamping block is provided on the ring block, a movable clamping block is rotatably connected to the fixed clamping block, a locking structure is provided on the fixed clamping block and the movable clamping block, a connecting plate is fixedly connected to the outer side wall of the fixed clamping block, a pneumatic push rod is fixedly connected to the upper end surface of the connecting plate, the driving end of the pneumatic push rod penetrates through the connecting plate and is fixedly connected to a first mounting plate, a second mounting plate is provided below the first mounting plate, a buffer structure is provided between the first mounting plate and the second mounting plate, an assembly plate is fixedly connected to the lower end surface of the second mounting plate, a follow-up block is detachably connected to the bottom end of the assembly plate through a bolt assembly, a bearing plate is fixedly connected to the inner side wall of the assembly plate, a laser is fixedly connected to the upper end surface of the bearing plate, a beam expander is installed at the end of the laser, a galvanometer scanner is installed at the outer end of the beam expander, and a focusing lens is installed at the lower end surface of the galvanometer scanner.

[0012] As a preferred technical solution of the present utility model, the locking structure includes a first connecting block and a second connecting block respectively fixed at the front ends of the fixed clamping block and the movable clamping block, a rotating seat is rotatably connected inside the first connecting block, a threaded column is fixedly connected to the rotating seat, and a locking head is threadedly connected to the threaded column.

[0013] As a preferred technical solution of the present utility model, the buffer structure includes two groups of mounting heads symmetrically installed at the front and rear ends of the first mounting plate and the second mounting plate, nuts are threadedly connected to the mounting heads, damping rods are fixedly connected between the upper and lower adjacent mounting heads, springs are sleeved on the damping rods, and the upper and lower ends of the springs are respectively fixedly connected to the mounting heads.

[0014] As a preferred technical solution of the present utility model, a limiting block is fixedly connected to the inner side wall of the fixed clamping block, and a card slot matching the limiting block is opened on the outer side wall of the ring block.

[0015] As a preferred technical solution of the present utility model, two through holes are symmetrically opened on the first mounting plate, and sliding rods are provided in both through holes, and the bottom ends of the sliding rods are fixedly connected to the second mounting plate.

[0016] As a preferred technical solution of the present utility model, the bolt assembly is a bolt and a nut, and mounting holes matching the bolt in the bolt assembly are respectively opened on the assembly plate and the follow-up block.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] In the solution of the present utility model:

[0019] 1. By providing an assembly plate, a follower block, a laser, a beam expander, a galvanometer head and a focusing lens, it is realized that when welding, two workpieces to be welded can be pressed to keep them on the same horizontal line, and at the same time, the workpieces to be welded can be assisted in heating, reducing the resistance of the workpieces to be welded, reducing the wear of the welding head during the welding process, and increasing the service life of the welding head, solving the problem that it is inconvenient to assist in heating the workpieces to be welded in the prior art;

[0020] 2. By providing a fixed clamping block, a movable clamping block, a locking structure, a limiting block and a clamping groove, it is realized that the ring block can be quickly installed and disassembled, the operation is relatively simple, and it is convenient for later disassembly and maintenance, solving the problem that it is more cumbersome to install and disassemble the ring block with multiple bolts in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. is a schematic diagram of the overall structure of the friction stir welding follower assisting device provided by the present utility model;

[0022] Figure 2 FIG. is a schematic diagram of the rear structure of the friction stir welding follower assisting device provided by the present utility model;

[0023] Figure 3 FIG. is a schematic diagram of the buffer structure of the friction stir welding follower assisting device provided by the present utility model;

[0024] Figure 4 FIG. is a schematic diagram of the locking structure of the friction stir welding follower assisting device provided by the present utility model;

[0025] Figure 5 FIG. is a schematic diagram of the unfolded structure of the friction stir welding follower assisting device provided by the present utility model;

[0026] Figure 6 FIG. is a schematic diagram of the front view structure of the friction stir welding follower assisting device provided by the present utility model.

[0027] Labels in the figure:

[0028] 1. Spindle; 2. Ring block; 3. Rotating shaft; 4. Welding head; 5. Fixed clamping block; 6. Movable clamping block; 7. Locking structure; 701. First connecting block; 702. Second connecting block; 703. Rotating base; 704. Threaded column; 705. Locking head; 8. Connecting plate; 9. Pneumatic push rod; 10. First mounting plate; 11. Second mounting plate; 12. Buffer structure; 1201. Mounting head; 1202. Nut; 1203. Damping rod; 1204. Spring; 13. Assembly plate; 14. Bolt assembly; 15. Follow-up block; 16. Bearing plate; 17. Laser; 18. Beam expander; 19. Scanning head; 20. Focusing lens; 21. Limit block; 22. Card slot; 23. Slide bar. Detailed implementation manner

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0030] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 shown, this implementation manner proposes a friction stir welding follow-up auxiliary device, including a spindle 1. A ring block 2 is provided at the bottom end of the spindle 1. A rotating shaft 3 is provided at the bottom end of the ring block 2. A welding head 4 is provided at the bottom end of the rotating shaft 3. The connection manners of the spindle 1, the ring block 2, the rotating shaft 3 and the welding head 4 are prior arts and will not be elaborated here. A fixed clamping block 5 is provided on the ring block 2. A movable clamping block 6 is rotatably connected to the fixed clamping block 5. A locking structure 7 is provided on the fixed clamping block 5 and the movable clamping block 6, which facilitates the quick locking of the fixed clamping block 5 and the movable clamping block 6 and is convenient for the installation and disassembly of the ring block 2. A connecting plate 8 is fixedly connected to the outer side wall of the fixed clamping block 5. A pneumatic push rod 9 is fixedly connected to the upper end surface of the connecting plate 8. The driving end of the pneumatic push rod 9 penetrates through the connecting plate 8 and is fixedly connected to a first mounting plate 10. A second mounting plate 11 is provided below the first mounting plate 10. A buffer structure 12 is provided between the first mounting plate 10 and the second mounting plate 11, which can avoid excessive downward pressure and buffer the pressure. The lower end surface of the second mounting plate 11 is fixedly connected to an assembly plate 13. The bottom end of the assembly plate 13 is detachably connected to a follow-up block 15 through a bolt assembly 14, which can contact two workpieces to be welded so that they are kept on the same horizontal plane. A bearing plate 16 is fixedly connected to the inner side wall of the assembly plate 13. A laser 17 is fixedly connected to the upper end surface of the bearing plate 16. A beam expander 18 is installed at the end of the laser 17. A scanning head 19 is installed at the outer end of the beam expander 18. A focusing lens 20 is installed at the lower end surface of the scanning head 19; it can preheat the welding part of the workpiece to be welded, thereby reducing the wear of the welding head 4 during welding and improving the service life.

[0031] As Figure 1 and Figure 4 shown, as a preferred embodiment, on the basis of the above manner, further, the locking structure 7 includes a first connecting block 701 and a second connecting block 702 respectively fixed to the front ends of the fixed clamping block 5 and the movable clamping block 6. A rotating seat 703 is rotatably connected inside the first connecting block 701. A threaded column 704 is fixedly connected to the rotating seat 703. A locking head 705 is threadedly connected to the threaded column 704; enabling the movable clamping block 6 to be conveniently locked on the fixed clamping block 5, easily realizing the locking and unlocking of the movable clamping block 6, and the operation is simple and convenient.

[0032] As Figure 1 and Figure 3 shown, as a preferred embodiment, on the basis of the above manner, further, the buffer structure 12 includes two groups of mounting heads 1201 symmetrically installed at the front and rear ends of the first mounting plate 10 and the second mounting plate 11. Nuts 1202 are threadedly connected to the mounting heads 1201. A damping rod 1203 is fixedly connected between the upper and lower adjacent mounting heads 1201. A spring 1204 is sleeved on the damping rod 1203. The upper and lower ends of the spring 1204 are respectively fixedly connected to the mounting heads 1201; it can play a buffering role during the driving process of the pneumatic push rod 9, reduce vibration and impact, improve the stability of the device, and at the same time can avoid excessive downward pressure during the downward pressing process.

[0033] As Figure 4 and Figure 5 shown, as a preferred embodiment, on the basis of the above manner, further, a limiting block 21 is fixedly connected to the inner side wall of the fixed clamping block 5, and a card slot 22 matching the limiting block 21 is formed on the outer side wall of the ring block 2; facilitating the positioning of the ring block 2, thereby ensuring the stability during installation.

[0034] As Figure 1 and Figure 3 shown, as a preferred embodiment, on the basis of the above manner, further, two through holes are symmetrically formed on the first mounting plate 10, and slide rods 23 are arranged in both through holes. The bottom ends of the slide rods 23 are fixedly connected to the second mounting plate 11; it can provide stable guidance for the driving of the pneumatic push rod 9, and at the same time can enable the follower block 15 to slide stably.

[0035] As Figure 2 and Figure 3 shown, as a preferred embodiment, on the basis of the above manner, further, the bolt assembly 14 is a bolt and a nut, and mounting holes matching the bolt in the bolt assembly 14 are respectively formed on the assembly plate 13 and the follower block 15; enabling the follower block 15 to be conveniently disassembled and replaced, enhancing the flexibility and adaptability of the device.

[0036] Specifically, when the friction stir welding follow-up auxiliary device is working / being used: the driving pneumatic push rod 9 is used to lower the first mounting plate 10 and the second mounting plate 11, so that the follow-up block 15 is lowered to contact the two workpieces to be welded, and then the two workpieces to be welded are on the same horizontal plane. Then, the laser 17 emits laser light, which passes through the beam expander 18 and is reflected by the galvanometer head 19 and then irradiated on the focusing lens 20. After passing through the focusing lens 20, a laser spot with a high energy density is generated. The laser spot irradiates the welding joints of the two workpieces to be welded to preheat them, thereby reducing the wear of the welding head 4 during welding; when disassembly is required, rotate the locking head 705 to move it outwards, and then drive the threaded column 704 and the rotating seat 703 to rotate by holding the locking head 705, and then open the movable clamping block 6 to complete the disassembly, and the operation is more convenient.

[0037] All technical features in this embodiment can be freely combined according to actual needs.

[0038] The above embodiment is a preferred implementation scheme of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution of the present invention is within the protection scope of the present invention.

Claims

1. A friction stir welding follow-up auxiliary device, including a main shaft (1), characterized in that, A ring block (2) is provided at the bottom end of the main shaft (1). A rotating shaft (3) is provided at the bottom end of the ring block (2). A welding head (4) is provided at the bottom end of the rotating shaft (3). A fixed clamping block (5) is provided on the ring block (2). A movable clamping block (6) is rotatably connected to the fixed clamping block (5). A locking structure (7) is provided on the fixed clamping block (5) and the movable clamping block (6). A connecting plate (8) is fixedly connected to the outer side wall of the fixed clamping block (5). A pneumatic push rod (9) is fixedly connected to the upper end surface of the connecting plate (8). The driving end of the pneumatic push rod (9) penetrates through the connecting plate (8) and is fixedly connected to a first mounting plate (10). A second mounting plate (11) is provided below the first mounting plate (10). A buffer structure (12) is provided between the first mounting plate (10) and the second mounting plate (11). An assembly plate (13) is fixedly connected to the lower end surface of the second mounting plate (11). A follower block (15) is detachably connected to the bottom end of the assembly plate (13) through a bolt assembly (14). A bearing plate (16) is fixedly connected to the inner side wall of the assembly plate (13). A laser (17) is fixedly connected to the upper end surface of the bearing plate (16). A beam expander (18) is installed at the end of the laser (17). A galvanometer scanner (19) is installed at the outer end of the beam expander (18). A focusing lens (20) is installed at the lower end surface of the galvanometer scanner (19).

2. The friction stir welding follow-up auxiliary device according to claim 1, wherein, The locking structure (7) includes a first connecting block (701) and a second connecting block (702) respectively fixed to the front ends of the fixed clamping block (5) and the movable clamping block (6). A rotating seat (703) is rotatably connected inside the first connecting block (701). A threaded column (704) is fixedly connected to the rotating seat (703). A locking head (705) is threadedly connected to the threaded column (704).

3. The friction stir welding follow-up auxiliary device according to claim 1, characterized in that, The buffer structure (12) includes two groups of mounting heads (1201) symmetrically installed at the front and rear ends of the first mounting plate (10) and the second mounting plate (11). Nuts (1202) are threadedly connected to the mounting heads (1201). A damping rod (1203) is fixedly connected between the upper and lower adjacent mounting heads (1201). A spring (1204) is sleeved on the damping rod (1203). The upper and lower ends of the spring (1204) are respectively fixedly connected to the mounting heads (1201).

4. A friction stir welding follow-up auxiliary device according to claim 1, characterized in that, A limiting block (21) is fixedly connected to the inner side wall of the fixed clamping block (5). A clamping groove (22) matching the limiting block (21) is formed on the outer side wall of the ring block (2).

5. The friction stir welding follow-up auxiliary device according to claim 1, characterized in that, Two through holes are symmetrically formed in the first mounting plate (10), and sliding rods (23) are arranged in both through holes. The bottom end of the sliding rod (23) is fixedly connected to the second mounting plate (11).

6. The follow-up auxiliary device for friction stir welding according to claim 1, wherein, The bolt assembly (14) is a bolt and a nut. Mounting holes matching the bolt in the bolt assembly (14) are respectively formed in the assembly plate (13) and the follower block (15).

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