Pressing mechanism for friction stir welding

Abstract

The utility model relates to the technical field of friction stir welding, and provides a friction stir welding pressing mechanism which comprises a base and a vertical frame, the vertical frame is arranged on the surface of the base, a mounting platform is arranged on the base, an adjusting assembly is arranged between the base and the mounting platform, and a welding equipment body is arranged on the vertical frame. The driving assembly is arranged between the welding equipment body and the vertical frame, the correcting and pressing assembly is arranged at the top of the mounting platform and comprises a transverse frame, the transverse frame is fixed to the surface of the mounting platform, a pair of telescopic air cylinders is arranged on the surface of the transverse frame, and the output ends of the telescopic air cylinders are connected with a lower pressing plate. By means of the technical scheme, the problems that in the prior art, a clamp, a pressing plate and other modes are generally adopted for fixing the welded workpiece in existing friction stir welding, however, the method can only clamp the periphery of the welded workpiece, when the surface of an aluminum alloy plate is uneven, deviation is likely to happen in the clamping and welding process, and therefore the welding quality is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of friction stir welding, and particularly to a pressing mechanism for friction stir welding. Background Art

[0002] Friction stir welding technology is used for welding aluminum alloy materials. Its principle is that at room temperature, two metals are mutually fused through the local tissues of the main body under the stirring and friction of a stirring head to achieve the welding purpose. During the welding process, the workpiece needs to bear great mechanical stress and thermal stress. Therefore, a tooling is adopted for fixation. The fixation of the workpiece to be welded should be comprehensively considered according to the groove machining accuracy, the design of the fixture, the metal to be welded, and the size, etc. During the welding process, lateral opening is likely to occur, and it is difficult to keep the joint gap unchanged. Especially when welding long-sized workpieces, great attention must be paid to the design of the fixture. The existing fixation of the workpiece to be welded in friction stir welding generally adopts methods such as clamps and pressing plates. However, this method can only clamp the periphery of the workpiece to be welded. When the surface of the aluminum alloy plate is uneven, it is likely to shift during the clamping and welding process, thus affecting the welding quality.

[0003] Therefore, improvements are made in view of the above problems. Summary of the Utility Model

[0004] The utility model provides a pressing mechanism for friction stir welding, which solves the problem that in the related art, the existing fixation of the workpiece to be welded in friction stir welding generally adopts methods such as clamps and pressing plates. However, this method can only clamp the periphery of the workpiece to be welded. When the surface of the aluminum alloy plate is uneven, it is likely to shift during the clamping and welding process, thus affecting the welding quality.

[0005] The technical solution of the utility model is as follows: It includes

[0006] a base and a vertical frame, and the vertical frame is arranged on the surface of the base;

[0007] a pair of mounting platforms and an adjusting component. The mounting platforms are both arranged on the base, and the adjusting component is arranged between the base and the mounting platforms;

[0008] a welding equipment main body and a driving component. The welding equipment main body is arranged on the vertical frame, and the driving component is arranged between the welding equipment main body and the vertical frame;

[0009] a correcting and pressing component, and the correcting and pressing component is arranged on the top of the mounting platform. The correcting and pressing component includes a cross frame. The cross frame is fixed on the surface of the mounting platform, and a pair of telescopic cylinders are arranged on the surface of the cross frame. The output end of the telescopic cylinder is connected with a lower pressing plate.

[0010] As a further technical solution, through holes are provided at both ends of the surfaces of the horizontal frame, the lower pressing plate, and the mounting platform, and a pair of guiding frames are provided on the top of the horizontal frame, and the guiding frames are located directly above the through holes.

[0011] As a further technical solution, a moving frame is slidably sleeved and connected to the guiding frame, a fastening frame is connected to the top of the moving frame through a threaded fit, and a pair of rotating rods are rotatably connected to the bottom of the moving frame, and the rotating rods are located within the through holes.

[0012] As a further technical solution, the adjusting assembly includes a pair of connecting grooves, which are respectively provided at both ends of the surface of the base, a round rod is provided within the connecting grooves, and the bottom of the mounting platform is slidably sleeved and connected to the round rod.

[0013] As a further technical solution, a rectangular opening is provided on the surface of the base, a driving gear is installed within the rectangular opening, the driving gear is controlled to rotate by a motor, a transmission rack is provided at the bottom of the base, the driving gear is located within the rectangular opening, and the transmission rack is engaged with the driving gear.

[0014] As a further technical solution, the driving assembly includes a horizontal lead screw, the horizontal lead screw is installed within the vertical frame, the horizontal lead screw is controlled to rotate by a motor, a moving seat is horizontally slidably connected within the vertical frame, and the moving seat is connected to the horizontal lead screw through a threaded fit.

[0015] As a further technical solution, a pair of control cylinders are installed on the moving seat, the main body of the welding equipment is connected to the output end of the control cylinder, and pressing frames are provided on both sides of the main body of the welding equipment.

[0016] As a further technical solution, the bottom surface of the pressing frame is an arc-shaped end surface structure, and the pressing frame is located on both sides of the output end of the main body of the welding equipment.

[0017] As a further technical solution, the bottom surface of the mounting platform is slidably fitted with the surface of the base.

[0018] As a further technical solution, the bottom surface of the lower pressing plate is a non-slip structural surface with a large frictional force.

[0019] The working principle and beneficial effects of the present utility model are as follows:

[0020] 1. In the present utility model, a correction and pressing assembly is provided. Through the interaction of structures such as a telescopic cylinder, a lower pressing plate, a guiding frame, a moving frame, a fastening frame, and a rotating rod, the position of the moving rod can be adjusted to install and correct the workpiece. After positioning, it can be continuously placed without the need for re - correction, and it firmly adheres to the upper and lower surfaces without skewing or other situations, having good stability.

[0021] 2. In the present utility model, an adjustment assembly is provided. Through the interaction of structures such as a round rod, a rectangular opening, a driving gear, and a transmission rack, the synchronous movement of two installation platforms can be controlled through the transmission of the driving gear and the transmission rack, enabling the workpiece to be quickly docked and kept in contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following further describes the present utility model in detail in conjunction with the drawings and specific embodiments.

[0023] Figure 1 is a schematic structural view of the present utility model;

[0024] Figure 2 is an axonometric view of the present utility model;

[0025] Figure 3 is an enlarged partial view of part A in the present utility model Figure 1 ;

[0026] Figure 4 is an enlarged partial view of part B in the present utility model Figure 1 ;

[0027] In the figure: 1, base; 2, vertical frame; 3, installation platform; 4, welding equipment main body; 5, correction and pressing assembly; 5 - 1, cross - frame; 5 - 2, telescopic cylinder; 5 - 3, lower pressing plate; 5 - 4, through - opening; 5 - 5, guiding frame; 5 - 6, moving frame; 5 - 7, fastening frame; 5 - 8, rotating rod; 6, adjustment assembly; 6 - 1, connection groove; 6 - 2, round rod; 6 - 3, rectangular opening; 6 - 4, driving gear; 6 - 5, transmission rack; 7, driving assembly; 7 - 1, horizontal lead screw; 7 - 2, moving seat; 7 - 3, control cylinder; 7 - 4, lower pressing frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of the present utility model.

[0029] As Figures 1 to 4As shown in the figure, this embodiment proposes a pressing mechanism for friction stir welding, including

[0030] a base 1 and a vertical frame 2, and the vertical frame 2 is arranged on the surface of the base 1;

[0031] a pair of mounting platforms 3 and an adjusting component 6. The mounting platforms 3 are both arranged on the base 1, and the adjusting component 6 is arranged between the base 1 and the mounting platforms 3;

[0032] a welding equipment main body 4 and a driving component 7. The welding equipment main body 4 is arranged on the vertical frame 2, and the driving component 7 is arranged between the welding equipment main body 4 and the vertical frame 2;

[0033] a correction pressing component 5. The correction pressing component 5 is arranged on the top of the mounting platform 3. The correction pressing component 5 includes a cross frame 5-1, the cross frame 5-1 is fixed on the surface of the mounting platform 3, a pair of telescopic cylinders 5-2 are arranged on the surface of the cross frame 5-1, the output end of the telescopic cylinder 5-2 is connected with a lower pressing plate 5-3, through holes 5-4 are opened on the surface of the cross frame 5-1, the surface of the lower pressing plate 5-3 and both ends of the surface of the mounting platform 3, a pair of guiding frames 5-5 are arranged on the top of the cross frame 5-1, the guiding frames 5-5 are located directly above the through holes 5-4, a moving frame 5-6 is slidably sleeved and connected on the guiding frames 5-5, the top of the moving frame 5-6 is threadedly connected with a fastening frame 5-7, and the bottom of the moving frame 5-6 is rotatably connected with a pair of rotating rods 5-8, and the rotating rods 5-8 are located in the through holes 5-4.

[0034] In this embodiment, in order to achieve the effect of correcting the position of the workpiece and firmly pressing it, a correction pressing component 5 is designed. Through holes 5-4 are opened on both sides of the surface of the base 1, the surface of the mounting platform 3 and the surface of the lower pressing plate 5-3. A guiding frame 5-5 is arranged on the top of the cross frame 5-1 and is connected with a slidable moving frame 5-6. Two rotating rods 5-8 are arranged at the bottom of the moving frame 5-6, and the rotating rods 5-8 are located in the through holes 5-4. The position of the workpiece can be corrected through the position of the rotating rods 5-8, and the fixed position can be adjusted. Two telescopic cylinders 5-2 are arranged on the cross frame 5-1, and the output end of the telescopic cylinder 5-2 is connected with a lower pressing plate 5-3. The lower pressing plate 5-3 can be controlled by the telescopic cylinder 5-2 to press downward on the surface of the workpiece.

[0035] Further, the adjustment assembly 6 includes a pair of connecting grooves 6-1 which are respectively arranged at both ends of the surface of the base 1. A round rod 6-2 is arranged in each connecting groove 6-1. The bottom of the mounting platform 3 is slidably sleeved and connected with the round rod 6-2. A rectangular opening 6-3 is formed in the surface of the base 1. A driving gear 6-4 is installed in the rectangular opening 6-3. The driving gear 6-4 is controlled to rotate by a motor. A transmission rack 6-5 is arranged at the bottom of the base 1. The driving gear 6-4 is located in the rectangular opening 6-3, and the transmission rack 6-5 is meshed with the driving gear 6-4.

[0036] In this embodiment, in order to achieve the effect of adjusting the supporting position at the bottom of the workpiece, the adjustment assembly 6 is designed. Two connecting grooves 6-1 are respectively formed on both sides of the surface of the base 1. A round rod 6-2 is arranged in each connecting groove 6-1. The mounting platform 3 is slidably connected to the round rod 6-2 and can linearly move on the round rod 6-2. A rectangular opening 6-3 is formed in the surface of the base 1. The rectangular opening 6-3 is provided with a driving gear 6-4 controlled to rotate by a motor. Transmission racks 6-5 are arranged at the bottoms of both mounting platforms 3. The transmission racks 6-5 are meshed with the driving gear 6-4. The two transmission racks 6-5 are located on both sides of the driving gear 6-4. When the driving gear 6-4 rotates, it can drive the mounting platforms 3 to move synchronously towards the center or both sides.

[0037] Further, the driving assembly 7 includes a transverse lead screw 7-1 which is installed in the vertical frame 2. The transverse lead screw 7-1 is controlled to rotate by a motor. A moving seat 7-2 is horizontally slidably connected in the vertical frame 2. The moving seat 7-2 is in threaded fit connection with the transverse lead screw 7-1. A pair of control cylinders 7-3 are installed on the moving seat 7-2. The welding equipment main body 4 is connected to the output end of the control cylinder 7-3. Pressing frames 7-4 are arranged on both sides of the welding equipment main body 4.

[0038] In this embodiment, in order to achieve the effect of controlling the stable movement and welding of the welding equipment main body 4, the driving assembly 7 is designed. A transversely arranged lead screw 7-1 controlled to rotate by opening is arranged in the vertical frame 2. A moving seat 7-2 is connected to the transverse lead screw 7-1. The moving seat 7-2 is controlled to linearly move in the vertical frame 2 by the transverse lead screw 7-1. A control cylinder 7-3 is arranged on the moving seat 7-2. The output end of the control cylinder 7-3 is connected to the welding equipment main body 4. The welding equipment main body 4 can be controlled by the control cylinder 7-3 to perform welding processing. Pressing frames 7-4 are arranged on both sides and can be pressed down and slidably fit on the surface of the workpiece to increase the pressure and keep the workpiece stable.

[0039] Further, the bottom surface of the pressing frame 7-4 is an arc-shaped end face structure, and the pressing frame 7-4 is located on both sides of the output end of the welding equipment main body 4.

[0040] In this embodiment, through the arc-shaped cross-sectional structure, the contact surface with the workpiece surface is reduced, and sliding fit can be maintained without damaging the workpiece.

[0041] Furthermore, the bottom surface of the mounting platform 3 is in sliding fit with the surface of the base 1.

[0042] In this embodiment, through the sliding fit effect, the movement of the mounting platform 3 is made more stable and has a firming effect.

[0043] Furthermore, the bottom surface of the lower pressing plate 5-3 is a non-slip structural surface with a relatively large friction force.

[0044] In this embodiment, through the non-slip effect of the relatively large friction force, the firming effect after the lower pressing plate 5-3 contacts the workpiece is increased.

[0045] When machining is required, according to the size of the workpiece, start the driving gear 6-4 to drive the transmission rack 6-5 to control the movement position of the mounting platform 3. Place the workpiece on the mounting platform 3 at the side. According to the length of the workpiece, push the moving frame 5-6 so that the rotating rod 5-8 fits against both ends of the workpiece, and tighten the fastening frame 5-7 to fix the moving frame 5-6. After the adjustment is completed, start the telescopic cylinder 5-2 to control the lower pressing plate 5-3 to press the workpiece tightly. Start the driving gear 6-4 again to fit the workpieces together. Start the control cylinder 7-3 to push the welding equipment main body 4 downward. After drilling into the workpiece surface, start the transverse lead screw 7-1 to control linear movement welding.

[0046] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A clamping mechanism for friction stir welding, characterized in that, including a base (1) and a vertical frame (2), the vertical frame (2) is arranged on the surface of the base (1); a pair of mounting platforms (3) and an adjusting component (6), the mounting platforms (3) are both arranged on the base (1), and the adjusting component (6) is arranged between the base (1) and the mounting platforms (3); a welding equipment main body (4) and a driving component (7), the welding equipment main body (4) is arranged on the vertical frame (2), and the driving component (7) is arranged between the welding equipment main body (4) and the vertical frame (2); a correction and pressing component (5), the correction and pressing component (5) is arranged on the top of the mounting platform (3), the correction and pressing component (5) includes a cross frame (5-1), the cross frame (5-1) is fixed on the surface of the mounting platform (3), and a pair of telescopic cylinders (5-2) are arranged on the surface of the cross frame (5-1), and the output end of the telescopic cylinder (5-2) is connected with a lower pressing plate (5-3).

2. The clamping mechanism for friction stir welding according to claim 1, wherein Through holes (5-4) are respectively arranged on the surface of the cross frame (5-1), the surface of the lower pressing plate (5-3) and the two ends of the surface of the mounting platform (3), and a pair of guiding frames (5-5) are arranged on the top of the cross frame (5-1), and the guiding frames (5-5) are located directly above the through holes (5-4).

3. The pressing mechanism for friction stir welding according to claim 2, characterized in that, A moving frame (5-6) is slidably sleeved and connected on the guiding frame (5-5), the top of the moving frame (5-6) is connected with a fastening frame (5-7) through thread fit, and the bottom of the moving frame (5-6) is rotatably connected with a pair of rotating rods (5-8), and the rotating rods (5-8) are located in the through holes (5-4).

4. The clamping mechanism for friction stir welding according to claim 1, characterized in that, The adjusting component (6) includes a pair of connecting grooves (6-1), the pair of connecting grooves (6-1) are respectively arranged at the two ends of the surface of the base (1), a round rod (6-2) is arranged in the connecting groove (6-1), and the bottom of the mounting platform (3) is slidably sleeved and connected with the round rod (6-2).

5. The pressing mechanism for friction stir welding according to claim 4, characterized in that, A rectangular opening (6-3) is arranged on the surface of the base (1), a driving gear (6-4) is installed in the rectangular opening (6-3), the driving gear (6-4) is controlled to rotate by a motor, a transmission rack (6-5) is arranged at the bottom of the base (1), the driving gear (6-4) is located in the rectangular opening (6-3), and the transmission rack (6-5) is meshed with the driving gear (6-4).

6. The clamping mechanism for friction stir welding according to claim 1, wherein, The driving component (7) includes a transverse lead screw (7-1), the transverse lead screw (7-1) is installed in the vertical frame (2), the transverse lead screw (7-1) is controlled to rotate by a motor, a moving seat (7-2) is horizontally slidably connected in the vertical frame (2), and the moving seat (7-2) is connected with the transverse lead screw (7-1) through thread fit.

7. The clamping mechanism for friction stir welding according to claim 6, wherein A pair of control cylinders (7-3) are installed on the moving seat (7-2), the welding equipment main body (4) is connected to the output end of the control cylinder (7-3), and pressing frames (7-4) are arranged on both sides of the welding equipment main body (4).

8. The pressing mechanism for friction stir welding according to claim 7, characterized in that, The bottom surface of the pressing frame (7-4) is an arc-shaped end face structure, and the pressing frame (7-4) is located on both sides of the output end of the welding equipment main body (4).

9. The pressing mechanism for friction stir welding according to claim 1, wherein The bottom surface of the installation platform (3) is slidably attached to the surface of the base (1).

10. The pressing mechanism for friction stir welding according to claim 1, characterized in that, The bottom surface of the lower pressing plate (5-3) is a non-slip structural surface with a large frictional force.

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