Self-adjusting clamping mechanism and method for stir welding

Abstract

The application discloses a self-adjusting clamping mechanism for stirring welding and a method, relates to the technical field of clamp equipment accessory devices, and comprises a base and a clamping mechanism, the clamping mechanism is uniformly arranged on the base, and the clamping mechanism further comprises an adjusting device, a rotating assembly, a lifting mechanism, a clamping mechanism and a top fixing device, a plurality of first mounting seats are arranged on the base, the adjusting device is rotationally connected with the base through the corresponding first mounting seat, the connecting end of the rotating assembly is connected with the top end of the adjusting device, the connecting end of the lifting mechanism is connected with the top end of the rotating assembly, a plurality of through holes are arranged on the rotating mechanism, the top fixing device is rotationally connected with the rotating mechanism through the corresponding through hole, and the clamping mechanism is uniformly arranged on the lifting mechanism. The application provides the flexibility of the equipment by adjusting the clamping of the equipment and adjusting the position and angle of the equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fixture equipment accessories, in particular to a self-adjusting clamping mechanism and method for stirring welding. BACKGROUND

[0002] Stir welding is a solid-state joining technology that is mainly used for welding light metals such as aluminum, but can also be applied to other materials such as magnesium alloys, copper alloys, titanium alloys, and even some plastics. Stir welding achieves joint formation without melting the material, thereby avoiding problems such as hot cracking, porosity, and welding distortion that can occur in traditional fusion welding processes. Stir welding technology is widely used in various industries, including aerospace, shipbuilding, automobile manufacturing, and rail transportation, due to its efficient and high-quality welding characteristics. These industries often require high-strength and high-reliability joints, and have strict control requirements for welding distortion. In addition, due to the relatively low heat input during the FSW process, it is particularly beneficial for heat-sensitive materials, which can reduce the performance degradation of the heat-affected zone (HAZ). During stir welding, the equipment needs to be adapted to the clamping. After cleaning the surface and removing the oxide layer, it is rotated and welded. The most common existing welding component clamping equipment is a fixture. A fixture is a device used in industrial production processes to clamp stir welding components. It has been widely used in the field of welding clamping. When using the existing fixture, first ensure that the surfaces of the two parts to be welded are clean, smooth, and free of oxidation and other impurities to ensure good welding quality. Accurately position and fix the two parts to be welded on the workbench. This step is crucial for ensuring stability during the welding process and the quality of the final joint. Select appropriate fixtures or positioning devices based on the shape and size of the workpiece. Adjust welding parameters such as rotation speed, forward speed, axial pressure, etc. based on factors such as material type, thickness, and required joint strength. The selection of these parameters directly affects the welding quality and efficiency. In the existing patent CN201280071460.2, a support device is disclosed, which is designed to support one or more workpieces connected by friction stir welding in a supporting manner. The support forms a weld between the two workpieces through friction stir welding. SUMMARY

[0003] In view of the deficiencies in the prior art, the present application provides a self-adjusting clamping mechanism and method for stir welding. The present application uses two-sided adjustable clamping to cooperate with the top for fixation, greatly improving the clamping stability of the equipment. The rotation mechanism is adjusted, greatly improving the welding flexibility of the equipment, ensuring uniform rotation of the equipment at different angles, and orderly stir welding.

[0004] The present application achieves the above technical purpose by the following technical means.

[0005] The self-adjusting clamping mechanism for stirring welding comprises a base and a clamping mechanism; the clamping mechanism is installed on the base; the clamping mechanism comprises an adjusting device, a rotating assembly, a lifting mechanism, a clamping mechanism and a top fixing device, a plurality of first mounting seats are arranged on the base, the adjusting device is rotatably connected with the base through the corresponding first mounting seat, the connecting end of the rotating assembly is connected with the top end of the adjusting device, the connecting end of the lifting mechanism is connected with the top end of the rotating assembly, a plurality of through holes are arranged on the rotating mechanism, the top fixing device is rotatably connected with the rotating mechanism through the corresponding through hole, and the clamping mechanism is uniformly installed on the lifting mechanism.

[0006] In the scheme, the adjusting device comprises a support rod, a first electric push rod, an adjusting rod, a sliding block, a first screw rod, a first motor and an adjusting disc; a plurality of support rods are rotatably connected with the base through the corresponding first mounting seat, a mounting groove is arranged on each of the plurality of support rods, the connecting end of each of the plurality of adjusting rods and the plurality of first electric push rods is hingedly connected with the corresponding mounting groove, the output end of each of the plurality of first electric push rods is hingedly connected with one end of the corresponding adjusting rod, a second mounting seat is arranged on each of the plurality of sliding blocks, the other end of each of the plurality of adjusting rods is rotatably connected with the corresponding sliding block through the corresponding second mounting seat, a plurality of sliding grooves are arranged on the adjusting disc, the plurality of sliding blocks are slidably connected with the adjusting disc through the corresponding sliding grooves, a plurality of machine seats are arranged on the adjusting disc, the connecting end of each of the plurality of first motors is connected with the connecting end of the corresponding machine seat, the output end of each of the plurality of first motors is connected with the connecting end of the corresponding first screw rod through the corresponding machine seat, and a threaded hole is arranged on each of the plurality of sliding blocks, and each of the plurality of first screw rods is threadedly connected with the corresponding sliding block through the corresponding threaded hole.

[0007] In the scheme, the rotating assembly comprises an electric rotating table, a mounting table, a stand and a compression ring, the connecting end of the electric rotating table is connected with the top end of the adjusting disc, the connecting end of the mounting table is connected with the output end of the electric rotating table, a plurality of stands are arranged on the mounting table, and the compression ring is arranged at the top end of the stand.

[0008] In the scheme, the lifting mechanism comprises a hydraulic cylinder, a limiting rod, a limiting plate, a connecting plate, a connecting rod, an elbow, an arc-shaped plate and a bottom top block, two hydraulic cylinders are arranged on the mounting table, the limiting rod is arranged between the two hydraulic cylinders and on the mounting table, the output end of the hydraulic cylinder is provided with the limiting plate, a top block is arranged above the limiting plate, the connecting plate is slidably arranged on the limiting rod, a clamping groove is formed on both sides of the connecting plate with the limiting rod as the center, a connecting seat is arranged on the end of the connecting plate away from the limiting rod, the connecting seat is rotatably connected with one end of the connecting rod, the other end of the connecting rod is rotatably connected below the arc-shaped plate, and the clamping groove is used for limiting the limiting plate; and the bottom top block is arranged on the end of the limiting rod close to the arc-shaped plate.

[0009] In the scheme, the arc-shaped plates include two half-circular plates, the bottom top blocks are hinge structures and are respectively hinged on the half-circular plates, the hydraulic cylinder works to drive the limiting plates to go up, the limiting plates push the connecting plates, so that the connecting rods drive the half-circular plates to rotate.

[0010] In the scheme, the clamping mechanism includes a motor, a second screw rod, a limiting connector, an arc-shaped die, a rubber strip, a spring, a buckle and an adapter connector; two sets of arc-shaped plates are provided with arc-shaped grooves, two sets of arc-shaped dies are respectively slidably connected with the corresponding arc-shaped plates through the corresponding arc-shaped grooves, the arc-shaped dies are provided with driving seats, the driving seats are provided with the motor, the output end of the motor is connected with the second screw rod, the second screw rod is threadedly connected with the arc-shaped plate, the connecting ends of the limiting connectors are respectively connected with the connecting ends of the corresponding arc-shaped dies, the arc-shaped plates are provided with limiting grooves, the limiting connectors are respectively slidably connected with the arc-shaped plates through the corresponding limiting grooves, the connecting ends of the two sets of rubber strips are respectively connected with the connecting ends of the corresponding arc-shaped dies, a plurality of groups of long grooves are provided on the two sets of arc-shaped dies, a plurality of groups of buckles are respectively slidably connected with the corresponding arc-shaped dies through the corresponding long grooves, a plurality of groups of springs are respectively fixedly sleeved with the corresponding buckles, and the connecting ends of a plurality of groups of adapter connectors are respectively rotationally connected with the corresponding buckles.

[0011] In the scheme, the top fixing device includes a driving rod, a driven rod, a second electric push rod and a positioning rod; the driving rod and the driven rod are rotationally connected with the compression ring, a plurality of groups of positioning rods are respectively rotationally connected with the corresponding driving rods and driven rods, the compression ring is provided with a positioning seat, the second electric push rod is rotationally connected with the compression ring through the positioning seat, and the output end of the second electric push rod is rotationally connected with the driving rod.

[0012] In the scheme, the top fixing device includes a driving rod, a driven rod, a second electric push rod and a positioning rod; the driving rod and the driven rod are rotationally connected with the compression ring, a plurality of groups of positioning rods are respectively rotationally connected with the corresponding driving rods and driven rods, the compression ring is provided with a positioning seat, the second electric push rod is rotationally connected with the compression ring through the positioning seat, and the output end of the second electric push rod is rotationally connected with the driving rod.

[0013] The clamping method of the self-adjusting clamping mechanism for stirring welding includes the following steps:

[0014] S1: in the process of stirring welding of the workpiece, the two parts of the workpiece to be welded are placed on the clamping mechanism, the clamping mechanism is in an idle state, the workpiece is placed on the arc-shaped die, the lifting mechanism is started to lift upward, the lifting mechanism pushes the arc-shaped plates below the arc-shaped plates during lifting, the two sets of arc-shaped plates are closed, after closing, the clamping mechanism is started to close, the workpiece is adaptively fixed on both sides of the two workpieces, so that the equipment clamping can be more suitable for workpieces of different shapes and sizes;

[0015] S2: after the longitudinal fixing is completed, the lifting mechanism is started to lift the arc-shaped plate to the top end, the top fixing assembly is fixed with the top of the matched workpiece, in the process, the top fixing assembly is uniformly distributed in a hexagonal connection state, and when rotating, gradually clamps from outside to inside, reduces the exposed space of the top, can push and clamp from outside to inside, or can pull and fix from inside to outside;

[0016] S3: after the fixing of the two sides in the longitudinal and transverse directions is completed, the rotating mechanism is started to drive the equipment to rotate as a whole, the fixing holes on the bottom plate are connected and fixed with the determined positions, so that the equipment can rotate uniformly at different angles and orderly stirring and welding can be carried out;

[0017] S4: when the angle of the stirring workpiece needs to be adjusted, the adjusting device is started, the adjusting device on the base is rotated, the adaptive angle clamping or expansion is realized, the overall angle of the equipment is adjusted, and different stirring and welding processing requirements can be met.

[0018] The beneficial effects of the present application are:

[0019] (1) in the process of stirring and welding the workpiece, the two sides are adjusted and clamped, and then the top is fixed, which greatly improves the clamping stability of the equipment.

[0020] (2) the equipment is adjusted in a hexagonal shape, so that the stable support structure can be provided by the triangular support of the equipment during the angle adjustment, so as to provide the stability of the equipment adjustment.

[0021] (3) the workpiece is clamped and the equipment is fixed by the bottom lifting mode, which greatly improves the automation level of the equipment.

[0022] (4) the equipment is adjusted and clamped in a hexagonal combination mode through the connecting rod, so that the uneven workpiece surface can be adaptively clamped under the condition of maximum contact area, and the clamping adjustment performance of the equipment is improved; the top fixing device in the application is used to reduce the exposed space of the top, to press the top of the workpiece, and to increase the stability during processing the workpiece.

[0023] (5) in the application, the motor is called to rotate the equipment, so that the equipment can rotate uniformly and orderly at different angles, and the effective stirring and welding is ensured, and the effective switching of multiple angles and multiple positions is completed.

[0024] (6) in the application, the equipment is adaptively clamped by sliding, the side of the workpiece is fixed, and the full-angle fixation of the workpiece is realized by adjusting the fixing bolt, so that the fixing stability of the equipment is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1It is a structural schematic diagram of a self-adjusting clamping mechanism for stir welding;

[0026] Figure 2 It is a front view schematic diagram of a self-adjusting clamping mechanism for stir welding;

[0027] Figure 3 It is a side view schematic diagram of Figure 2 ;

[0028] Figure 4 It is a top view schematic diagram of Figure 2 ;

[0029] Figure 5 It is a schematic diagram of an arc-shaped plate and an elbow involved in Figure 2 ;

[0030] Figure 6 It is a schematic diagram of a buckle and an arc-shaped mold involved in Figure 1 ;

[0031] Figure 7 It is a schematic diagram of a stand and a compression ring structure involved in Figure 2 ;

[0032] Figure 8 It is a schematic diagram of an electric rotating table and an adjusting disc involved in Figure 2 .

[0033] Reference signs:

[0034] 1 - base; 201 - first mounting seat; 202 - through hole; 301 - support rod; 302 - first electric push rod; 303 - adjusting rod; 304 - sliding block; 305 - first screw rod; 306 - first motor; 307 - adjusting disc; 308 - mounting groove; 309 - second binding seat; 310 - sliding groove; 311 - machine base; 312 - threaded hole; 401 - electric rotating table; 402 - mounting table; 403 - stand; 404 - compression ring; 501 - hydraulic cylinder; 502 - limiting rod; 503 - limiting plate; 504 - connecting plate; 505 - connecting rod; 506 - elbow; 507 - arc-shaped plate; 508 - bottom top block; 509 - limiting hole; 510 - clamping groove; 511 - connecting seat; 601 - motor; 602 - second screw rod; 603 - limiting joint; 604 - arc-shaped mold; 605 - rubber strip; 606 - spring; 607 - buckle; 608 - adapter joint; 609 - arc-shaped groove; 610 - driven rod; 703 - second electric push rod; 704 - positioning rod; 705 - positioning seat; 801 - lateral positioning bolt; 802 - knob; 803 - tight hole; 804 - rotating hole. DETAILED DESCRIPTION

[0035] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters throughout the figures denote the same elements or elements with the same functions. The embodiments described below are exemplary and are intended to be illustrative of the present application and are not to be used to limit the present application. Specific structural and functional details disclosed herein are not to be interpreted as limiting but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to make or use the application.

[0036] In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer", and the like is based on the orientation or positional relationship shown in the drawings, and is merely for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application. In addition, the terms "first", "second" are used only for the purpose of description, and cannot be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0037] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] The accompanying drawings are incorporated into and constitute a part of this specification, and illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application. Figure 1 , Figure 2 and Figure 8, the adjusting mechanism includes support rods 301, first electric push rods 302, adjusting rods 303, sliding blocks 304, first lead screws 305, first motors 306 and an adjusting disc 307; the base 1 is located at the bottom end of the self-adjusting clamping mechanism for stirring and welding, six groups of mounting seats 201 are evenly distributed on the base 1, six groups of support rods 301 are rotatably connected to the base 1 through the corresponding first mounting seats 201, six groups of first push rods 302 are connected to the six groups of support rods 301, mounting grooves 308 are located on the six groups of support rods 301, the output ends of the six groups of first electric push rods 302 are hingedly connected to the output ends of the corresponding adjusting rods 303, the connecting ends of the six groups of adjusting rods 303 and the six groups of first electric push rods 302 are hingedly connected to the corresponding mounting grooves 308, six groups of sliding blocks 304 are located below the adjusting disc 307, second clamps 309 are arranged on the six groups of sliding blocks 304, the other connecting ends of the six groups of adjusting rods 303 are rotatably connected to the corresponding sliding blocks 304 through the corresponding second clamps 309, six groups of sliding grooves 310 are arranged on the adjusting disc 307, the six groups of sliding blocks 304 are slidably connected to the adjusting disc 307 through the corresponding sliding grooves 310. Six groups of machine seats 311 are located on the adjusting disc, the connecting sections of the six groups of machine seats 311 are connected to the connecting ends of the corresponding six groups of first motors 306, the output ends of the six groups of first motors 306 are connected to the connecting ends of the corresponding first lead screws 305 through the corresponding machine seats 311, threaded holes 312 are arranged on the six groups of sliding blocks 304, and the six groups of first lead screws 305 are threadedly connected to the corresponding sliding blocks 304 through the corresponding threaded holes 312.

[0039] The accompanying drawings are referred to in connection with the description of embodiments. Figure 1 The rotating assembly includes an electric rotating table 401, a mounting table 402, columns 403 and a compression ring 404; the electric rotating table 401 is located between the mounting table 402 and the adjusting disc 307. The connecting end of the electric rotating table 401 is connected to the top end of the adjusting disc 307, and the connecting end of the mounting table 402 is connected to the output end of the electric rotating table 401. Two groups of columns 403 are located above the mounting table 402, and the connecting ends of the two groups of columns 403 are connected to the connecting end of the mounting table 402. The connecting end of the compression ring 404 is connected to the top ends of the two groups of columns 403.

[0040] The accompanying drawings are referred to in connection with the description of embodiments. Figure 2 , Figure 5 and Figure 7The lifting mechanism comprises hydraulic cylinders 501, limiting rods 502, limiting plates 503, connecting plates 504, connecting rods 505, elbows 506, arc-shaped plates 507, and bottom top blocks 508. Two groups of hydraulic cylinders 501 are located on the mounting table 402, and the connecting ends of the two groups of hydraulic cylinders 501 are connected with the top end of the mounting table 402. The limiting rods 502 are located between the two groups of hydraulic cylinders 501, and the connecting end of the limiting rods 502 is connected with the top end of the mounting table 402. Two groups of limiting plates 503 are located on the two groups of hydraulic cylinders 501, and the connecting ends thereof are respectively connected with the output ends of the corresponding hydraulic cylinders 501. The connecting ends of two groups of bottom top blocks 508 are respectively connected with the top ends of the corresponding limiting plates 503. The connecting plates 504 are located on the limiting rods 502, and the connecting plates 504 are provided with limiting holes 509. The limiting rods 502 are slidably connected with the connecting plates 504 through the limiting holes 509. The connecting plates 504 are provided with clamping grooves 510. The elbows 506 are located at the top end of the limiting rods 502, and the connecting end of the elbow 506 is connected with the top end of the limiting rod 502. Two groups of arc-shaped plates 507 are rotatably connected with the elbow 506. Connecting seats 511 are provided on the arc-shaped plates 507 and the connecting plates 504. The connecting ends of four groups of connecting rods 505 are rotatably connected with the corresponding arc-shaped plates 507 and the connecting plates 504 through the corresponding connecting seats 511.

[0041] The accompanying drawings are referred to in connection with the description of embodiments. Figure 5 And Figure 6 The clamping mechanism comprises motors 601, second lead screws 602, limiting connectors 603, arc-shaped molds 604, rubber strips 605, springs 606, buckles 607, and adapter connectors 608. Arc-shaped grooves 609 are provided on the two groups of arc-shaped plates 507. Two groups of arc-shaped molds 604 are slidably connected with the corresponding arc-shaped plates 507 through the corresponding arc-shaped grooves 609. Drive seats 610 are provided on the side surfaces of the arc-shaped molds 604. The connecting ends of four groups of motors 601 are connected with the connecting ends of the corresponding drive seats 610. The output ends of the four groups of motors 601 are connected with the connecting ends of the corresponding second lead screws 602 through the corresponding drive seats 610. Screw holes 611 are provided on the two groups of arc-shaped plates 507. Four groups of second lead screws 602 are threadedly connected with the corresponding arc-shaped plates 507 through the corresponding screw holes 611. The connecting ends of four groups of limiting connectors 603 are connected with the connecting ends of the corresponding arc-shaped molds 604. Limiting grooves 612 are provided on the two groups of arc-shaped plates 507. Four groups of limiting connectors 603 are slidably connected with the corresponding arc-shaped plates 507 through the corresponding limiting grooves 612. The connecting ends of two groups of rubber strips 605 are connected with the connecting ends of the corresponding arc-shaped molds 604. A plurality of groups of long grooves 613 are provided on the two groups of arc-shaped molds 604. A plurality of groups of buckles 607 are slidably connected with the corresponding arc-shaped molds 604 through the corresponding long grooves 613. A plurality of groups of springs 606 are fixedly sleeved with the corresponding buckles 607. The connecting ends of a plurality of groups of adapter connectors 608 are rotatably connected with the corresponding buckles 607.

[0042] The accompanying drawings Figure 4 and Figure 6 The top fixing device comprises a driving rod 701, a driven rod 702, a second electric push rod 703, a positioning rod 704, a lateral positioning bolt 801 and a rotating knob 802; the driving rod 701 and the plurality of groups of driven rods 702 are respectively connected with the compression ring 404 in rotation through corresponding through holes 202, the plurality of groups of positioning rods 704 are respectively connected with the corresponding driving rods 701 and driven rods 702 in rotation, the compression ring 404 is provided with a positioning seat 705, the second electric push rod 703 is connected with the compression ring 404 in rotation through the positioning seat 705, and the output end of the second electric push rod 703 is connected with the connecting end of the driving rod 701 in rotation. The two groups of arc-shaped plates 507 are provided with tight holes 803, the four groups of lateral positioning bolts 801 are respectively connected with the corresponding arc-shaped plates 507 in screw threads through corresponding tight holes 803, a plurality of tight holes 803 are provided with corresponding rotating holes 804, and the plurality of rotating knobs 802 are respectively connected with the corresponding arc-shaped plates 507 in screw threads through corresponding rotating holes 804.

[0043] The self-adjusting clamping mechanism for stirring and welding of the present application has the following specific implementation steps in the embodiment:

[0044] S1: After the equipment is started, the adjustment of lifting is first carried out. The two groups of components to be welded are placed on the corresponding arc-shaped molds 604, and the two groups of arc-shaped molds 604 are in an outwardly inclined lifting state in the idle state. After the workpieces are placed, the bottom hydraulic cylinder 501 is started to be lifted. In the lifting process of the bottom hydraulic cylinder 501, the bottom top block 508 is driven to push the two arc-shaped plates 507, and the bottom top block 508 presents a center concave and two sides convex state to fold the two groups of arc-shaped plates 507.

[0045] S2: In the folding process, the two groups of arc-shaped plates 507 are rotated on the elbow 506, and the limiting plate 503 is clamped into the connecting plate 504, and the connecting plate 504 is stably lifted by the clamping and clamping mode, so that the connecting plate 504 is orderly slid on the limiting plate 503.

[0046] S3: The connecting plate 504 is driven to rotate by the lifting of the connecting plate 504, the relative position of the connecting plate 504 and the elbow 506 is changed, the arc-shaped plate 507 is stably closed, and a stable support structure is formed with the connecting rod 505. The closing by lifting greatly improves the automation level of the equipment processing.

[0047] S4: After the lifting adjustment is completed, the clamping of the workpiece is performed. After the arc-shaped plate 507 is closed, the motor 601 is started to rotate on the arc-shaped die 604. The second lead screw 602 is driven to rotate by the rotating motor 601. The arc-shaped die 604 and the arc-shaped plate 507 are concentrically placed through the threaded connection between the second lead screw 602 and the arc-shaped plate 507. In this process, the buckle 607 and the workpiece are in contact, the buckles 607 between the groups slide and clamp each other, and slide and clamp with the arc-shaped die 604, so as to ensure the stability of the sliding;

[0048] S5: In this process, the adapter 608 is clamped at different positions of the workpiece. When the arc-shaped angle or the recess is encountered, the adapter 608 rotates on the buckle 607 to make up for the clamping of different angles and positions. The buckle 607 slides on the arc-shaped die 604, and is fixed by the counter thrust of the spring 606;

[0049] S6: After the arc-shaped die 604 and the arc-shaped plate 507 are concentric, the arc-shaped plate 507 and the arc-shaped die 604 are sleeved with the compression ring 404. The rubber strip 605 on the arc-shaped die 604 improves the friction force of the sleeve and improves the stability of the fixation;

[0050] S7: During the process of fixing the workpiece, the lateral positioning bolt 801 is rotated to extend, so as to fix the workpiece in the horizontal full angle. The rotating knob 802 improves the fixing stability of the lateral positioning bolt 801;

[0051] S8: After the horizontal fixation of the workpiece is completed, the second electric push rod 703 is started to push and pull, so as to drive the driving rod 701 to rotate. During the rotation of the driving rod 701, the angle of the compression ring 404 changes;

[0052] S9: The top fixing assembly is uniformly distributed in a hexagonal connection state. When it rotates, it gradually clamps from the outside to the inside, reduces the exposed space at the top, and can push and clamp from the outside to the inside or pull and fix from the inside to the outside;

[0053] S10: The driven rod 702 and the positioning rod 704 are connected in a triangular connection, so that the zooming of the central region of the driven rod 702 and the positioning rod 704 can adaptively fix the workpiece. The fixation of the workpiece is completed, which greatly improves the stability of the workpiece processing;

[0054] S11: After the workpiece is fixed, the angle of the stirring workpiece is adjusted. Before the adjusting device is started, the support rod 301 and the adjusting rod 303 are inclined inward at an angle of 45°, supported by the first electric push rod 302, forming a stable triangular structure. When angle adjustment is needed, the first electric push rod 302 is started to extend, driving the three groups of first electric push rods 302 to compress, completing the tilting or overall lowering of the adjusting disc 307. The remaining three groups of first electric push rods 302 complete lifting, and the compressed support rod 301 and adjusting rod 303 are angle supplemented. The first electric push rod 302 is used to support the compressed or expanded angle of the support rod 301 and the adjusting rod 303;

[0055] S12: When the device needs to adjust a narrower angle, the first motor 306 connected to the adjusting disc 307 can be started to rotate. When the first motor 306 rotates, the first screw rod 305 is driven to rotate, and the sliding block 304 is driven to rotate on the adjusting disc 307 by the threaded connection between the first screw rod 305 and the sliding block 304, thereby changing the relative position of the adjusting rod 303 and improving the flexibility of the device angle adjustment;

[0056] S13: By adjusting the angle of the adjusting disc 307, the clamped workpiece is rotated in real time, which can improve the flexibility and bending angle of the stirring welding, greatly improving the adjustment performance of the device;

[0057] S14: After the angle adjustment is completed, the rotating mechanism is started to drive the device to rotate as a whole. The electric turntable 401 is connected to the adjusting disc 307 and drives the mounting table 402 to rotate stably through the worm gear structure, which can stably rotate the device and workpiece on the mounting table 402. The mounting table 402 and the compression ring 404 are connected by the stand column 403, which is stably connected to the mounting table 402 and the compression ring 404 by welding process, so as to avoid damage under long-time buckling and pulling out action;

[0058] S15: The rotating mechanism can effectively switch between multiple angles and multiple welding positions, ensuring the effective performance of the welding work. The rotating mechanism greatly improves the welding flexibility of the device, ensures uniform rotation of the device at different angles, and performs orderly stirring welding.

[0059] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application without departing from the principles and spirit of the present application.

Claims

1. A self-adjusting clamping mechanism for stir welding, characterized by, The utility model provides a clamping mechanism, including base (1) and clamping mechanism, clamping mechanism installs on base (1), clamping mechanism includes adjusting device, rotating assembly, elevating system, clamping mechanism and top fixed device, is provided with a plurality of first mounting seat (201) on base (1), adjusting device passes through corresponding first mounting seat (201) and is connected with base (1) rotationally, rotating assembly sets up on adjusting device, elevating system sets up on rotating assembly, is provided with a plurality of through -hole (202) on rotating mechanism, and top fixed device passes through corresponding through -hole (202) and rotating mechanism rotationally connects, and clamping mechanism evenly installs on elevating system, rotating assembly includes motorized turntable (401), installation platform (402), stand (403) and compression ring (404), motorized turntable (401) connecting end and adjusting disc (307) top end connection, installation platform (402) connecting end and motorized turntable (401) output end connection, a plurality of stand (403) sets up on installation platform (402), and compression ring (404) sets up with stand (403) top end, elevating system includes hydraulic cylinder (501), limit rod (502), limit plate (503), connecting plate (504), connecting rod (505), elbow (506), arc plate (507) and bottom top block (508), two hydraulic cylinder (501) sets up on installation platform (402), limit rod (502) is between hydraulic cylinder (501) and sets up on installation platform (402), the output of hydraulic cylinder (501) is provided with limit plate (503), the top block (508) of limit plate (503) top position is equipped with, the connecting plate (504) of sliding set up is equipped with on limit rod (502), with limit rod (502) as center, the clamping groove (510) of connecting plate (504) both sides is seted up, the connecting seat (511) of connecting plate (504) is seted up away from limit rod (502) end, and connecting seat (511) is rotatably connected with one end of connecting rod (505), and the other end of connecting rod (505) is rotatably connected under arc plate (507), the clamping groove (510) is used to limit limit plate (503), the bottom top block (508) of limit rod (502) is seted up near arc plate (507) end, clamping mechanism includes motor (601), second screw rod (602), limit connector (603), arc mould (604), rubber strip (605), spring (606), buckle (607) and adaptive connector (608),Two groups of arc-shaped plates (507) are provided with arc-shaped grooves (609) penetrating through, two groups of arc-shaped molds (604) are respectively connected with corresponding arc-shaped plates (507) through corresponding arc-shaped grooves (609), the arc-shaped mold (604) is provided with a driving seat (610), the driving seat (610) is provided with a motor (601), the output end of the motor (601) is connected with a second lead screw (602), the second lead screw (602) is threadedly connected with the arc-shaped plate (507), the connecting ends of a plurality of limiting connectors (603) are respectively connected with the connecting ends of corresponding arc-shaped molds (604), the arc-shaped plate (607) is provided with a limiting groove (612), a plurality of limiting connectors (603) are respectively connected with corresponding arc-shaped plates (507) through corresponding limiting grooves (612), the arc-shaped plate (507) comprises two half-circular plates, the bottom top block (508) is a hinge structure and is respectively hinged on the two half-circular plates, the hydraulic cylinder (501) works to drive the limiting plate (503) to move upwards, the limiting plate (503) drives the connecting plate (504), so that the connecting rod (505) drives the half-circular plate to rotate after starting the electric rotating table (401); the connecting ends of two groups of rubber strips (605) are respectively connected with the connecting ends of corresponding arc-shaped molds (604), a plurality of long grooves (613) are provided on the two groups of arc-shaped molds (604), a plurality of buckles (607) are respectively connected with corresponding arc-shaped molds (604) through corresponding long grooves (613), a plurality of springs (606) are respectively fixedly sleeved with corresponding buckles (607), and the connecting ends of a plurality of adapter connectors (608) are respectively rotatably connected with corresponding buckles (607); the top fixing device comprises a driving rod (701), a driven rod (702), a second electric push rod (703) and a positioning rod (704); the driving rod (701) and the driven rod (702) are rotatably connected with the compression ring (404), a plurality of positioning rods (704) are respectively rotatably connected with corresponding driving rods (701) and driven rods (702), the compression ring (404) is provided with a positioning seat (705), the second electric push rod (703) is rotatably connected with the compression ring (404) through the positioning seat (705), and the output end of the second electric push rod (703) is rotatably connected with the driving rod (701).

2. The self-adjusting clamping mechanism for welding with stirring according to claim 1, characterized in that The adjusting device comprises support rods (301), first electric push rods (302), adjusting rods (303), sliding blocks (304), first screws (305), first motors (306) and adjusting discs (307); the support rods (301) are rotatably connected with the base (1) through corresponding first mounting seats (201), the mounting grooves (308) are arranged on the support rods (301), the connecting ends of the adjusting rods (303) and the first electric push rods (302) are hingedly connected with the corresponding mounting grooves (308), the output ends of the first electric push rods (302) are hingedly connected with one ends of the adjusting rods (303), the second binding seats (309) are arranged on the sliding blocks (304), the other ends of the adjusting rods (303) are rotatably connected with the corresponding sliding blocks (304) through the corresponding second binding seats (309), the sliding grooves (310) are arranged on the adjusting disc (307), the sliding blocks (304) are slidably connected with the adjusting disc (307) through the corresponding sliding grooves (310), the motor seats (311) are arranged on the adjusting disc (307), the connecting ends of the first motors (306) are connected with the connecting ends of the motor seats (311), the output ends of the first motors (306) are connected with the connecting ends of the first screws (305) through the motor seats (311), and the threaded holes (312) are arranged on the sliding blocks (304) and the first screws (305) are threadedly connected with the sliding blocks (304) through the corresponding threaded holes (312).

3. The self-adjusting clamping mechanism for welding with stirring according to claim 1, characterized in that The lateral positioning bolts (801) and the rotating knobs (802) are further arranged, the arc-shaped plates (507) in the lifting mechanism are symmetrically provided with the tight holes (803), the four groups of lateral positioning bolts (801) are threadedly connected with the corresponding arc-shaped plates (507) through the corresponding tight holes (803), the rotating holes (804) are arranged on the groups of tight holes (803) in a matched mode, and the groups of rotating knobs (802) are threadedly connected with the corresponding arc-shaped plates (507) through the corresponding rotating holes (804).

4. A clamping method using the self-adjusting clamping mechanism for stir welding according to claim 1, characterized by, The method comprises the following steps: S1: in the process of stirring welding of the workpieces, the two workpieces to be welded are placed on the clamping mechanism, the clamping mechanism is in an outwardly inclined state in the idle state, the workpieces are placed on the arc-shaped die (604), the lifting mechanism is started to be lifted upward, the arc-shaped plates (507) are pushed below the arc-shaped plates (507) in the lifting process, the two groups of arc-shaped plates (507) are closed, the clamping mechanism is started to be closed after the closing is completed, the workpieces are adaptively fixed on both sides of the two workpieces, and the equipment clamping can be more suitable for workpieces of different shapes and sizes. S2: After the longitudinal fixation is completed, the lifting mechanism is started to lift the arc-shaped plate (507) to the top end, so that the top fixing assembly is fixed to the top of the matched workpiece. In this process, the top fixing assembly is uniformly distributed in a hexagonal connection state, and when it rotates, it gradually clamps from outside to inside, reduces the exposed space of the top, and can push and clamp from outside to inside or pull and fix from inside to outside; S3: After the longitudinal and lateral fixation is completed, the rotating mechanism is started to drive the equipment to rotate as a whole, and the fixed holes on the bottom plate are connected and fixed with the predetermined positions to ensure that the equipment rotates uniformly at different angles and is orderly stirred and welded; S4: When the angle of the stirred workpiece needs to be adjusted, the adjusting device is started to rotate the adjusting device on the base (1), so that it is adaptively angle clamped or unfolded, and the overall angle of the equipment is adjusted to adapt to different stirring and welding processing requirements.

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