Friction stir welding and machining integrated clamping tooling

Abstract

The application discloses integrated clamping tooling of friction stir welding and machining, which comprises side plate frames, two groups of which are symmetrically arranged, a lifting cylinder with downward telescopic control is arranged on the top of the side plate frame, a supporting plate support is fixed to the lower output end of the lifting cylinder, a supporting plate is fixed to the supporting plate support, a loading mechanism is arranged on the supporting plate, the loading mechanism can load and fix a workpiece to be machined, a rotatable clamping mechanism is arranged between the tops of the two groups of side plate frames, and the clamping mechanism can clamp the workpiece to be machined on the loading mechanism and perform butt joint processing.

Description

Technical Field

[0001] This invention relates to the field of welding processing technology, specifically to an integrated clamping fixture for friction stir welding and machining. Background Technology

[0002] Friction stir welding is an emerging welding technology with advantages such as high welding quality, fast welding speed, and small heat-affected zone. It is widely used for joining various materials and structures.

[0003] Machining refers to using different mechanical processing methods, such as milling, drilling, and cutting, to process parts into the required shape and size. Integrated clamping fixtures combine friction stir welding and machining to achieve integrated welding and machining operations.

[0004] Currently, the welding and machining processes used for friction stir welding typically require the use of different clamping fixtures and multiple clamping and disassembly operations. This not only increases production time and costs but may also affect the accuracy and quality of machining and welding.

[0005] Therefore, it is necessary to provide integrated fixtures for friction stir welding and machining to solve the problems mentioned in the background art. Summary of the Invention

[0006] To achieve the above objectives, the present invention provides the following technical solution: an integrated clamping fixture for friction stir welding and machining, comprising two sets of side plate frames symmetrically arranged. A downward telescopic lifting cylinder is installed on the top of the side plate frame, and a pallet bracket is fixed to the lower output end of the lifting cylinder. A pallet is fixed on the pallet bracket, and a loading mechanism is installed on the pallet. The loading mechanism can load and fix the workpiece to be processed. A rotatable clamping mechanism is installed between the tops of the two sets of side plate frames. The clamping mechanism can clamp the workpiece to be processed on the loading mechanism and perform docking processing.

[0007] Furthermore, as a preferred embodiment, the pallet is provided with a groove, and the bottom of the groove is provided with a sliding opening that penetrates the pallet;

[0008] The loading mechanism includes a first baffle, a second baffle, a second bolt, and a nut. The first baffle is fixed to one end of the slide groove. The second baffle is fixed with a sliding plate that slides with the slide groove. The sliding plate is provided with a second threaded hole. The second bolt can be twisted and inserted into the second threaded hole and pass through the slide opening to be threadedly assembled with the nut.

[0009] Furthermore, as a preferred embodiment, the clamping mechanism includes a frame plate and a first motor. The middle part of the left end and the middle part of the right end of the frame plate are respectively rotatably assembled with the left side plate and the right side plate, and the first motor is installed on the left side plate for controlling the rotation of the frame plate.

[0010] Furthermore, a bidirectional telescopic cylinder is installed on the left and right ends of the frame, a third motor is installed on the output end of the bidirectional telescopic cylinder, and a positioning strip plate that can slide back and forth is installed on the front and rear sides of the frame, and the positioning strip plate is respectively connected to the output end of the left and right third motors.

[0011] Furthermore, the positioning strip is provided with multiple positioning seats, a second motor is installed on the positioning seat, a lifting mechanism is installed on the second motor, and a clamping plate for clamping the workpiece to be processed is installed on the lifting mechanism.

[0012] Furthermore, as a preferred embodiment, the positioning strip has a central sliding cavity in the middle, and the positioning strip also has side sliding openings that are cross-shaped and connected to the central sliding cavity;

[0013] The positioning seat includes a central character slider and a bolt. The central character slider is slidably assembled with the central sliding cavity and the longitudinal side sliding opening. The central character slider is provided with a threaded hole in the transverse direction. The bolt can be inserted into the threaded hole and fit against the positioning strip plate. A support plate perpendicular to the horizontal plane is also fixed on the central character slider. The second motor is fixed on one side of the support plate, and a lifting mechanism controlled by the second motor is rotatably installed on the other side of the support plate.

[0014] Furthermore, as a preferred embodiment, the lifting mechanism includes a vertical turntable mounted on the output end of the second motor, a slide rail fixed at the center of the vertical turntable, a screw and a fourth motor for adjusting the screw mounted on the slide rail, a threaded sleeve threadedly engaged with the screw and slidably assembled with the slide rail, and the clamping plate being laterally fixedly connected to the threaded sleeve.

[0015] Furthermore, as a preferred embodiment, the outer end of the clamping plate is provided with vertically symmetrically distributed blocks.

[0016] Furthermore, as a preferred embodiment, the surface of the block and the surface of the clamping plate located in the space between the block and the clamping plate are respectively provided with rough surfaces.

[0017] Furthermore, as a preferred embodiment, the pallet is provided with a top block in the middle that can support the workpiece to be processed.

[0018] Furthermore, as a preferred embodiment, the loading mechanism is symmetrically arranged on the front and rear sides of the top block.

[0019] Compared with the prior art, the present invention provides an integrated clamping fixture for friction stir welding and machining, which has the following advantages:

[0020] 1. In this invention, the top block helps to reduce the vertical force on the clamping plate during the friction stir welding process of the workpiece, which helps to improve the stability of the friction stir welding of the workpiece; the loading mechanism and clamping mechanism enable the workpiece to be placed in the loading mechanism without the need for subsequent manual operation by the worker. The subsequent clamping and fixing of the workpiece is automated, making the processing of the workpiece safer and more efficient.

[0021] 2. The structural design of the clamping mechanism in this invention facilitates both friction stir welding and subsequent machining processes, and eliminates the need for secondary clamping of the workpiece, thereby improving the processing efficiency and protection of the workpiece. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the integrated clamping fixture structure for friction stir welding and machining according to the present invention;

[0023] Figure 2 This is a partial structural diagram of the integrated clamping fixture for friction stir welding and machining according to the present invention. Figure 1 ;

[0024] Figure 3 This is a partial structural diagram of the integrated clamping fixture for friction stir welding and machining according to the present invention. Figure 2 ;

[0025] Figure 4 This is a partial structural diagram of the integrated clamping fixture for friction stir welding and machining according to the present invention. Figure 3 ;

[0026] In the diagram: 1. Side plate frame; 2. Clamping mechanism; 3. Lifting cylinder; 4. Pallet bracket; 5. Top block; 6. Pallet; 7. Loading mechanism; 21. Frame plate frame; 22. First motor; 23. Positioning strip; 24. Bidirectional telescopic cylinder; 25. Positioning seat; 26. Second motor; 27. Lifting mechanism; 28. Clamping plate; 231. Central sliding cavity; 232. Side sliding opening; 251. Central slider; 252. Threaded hole one; 253. Support plate; 254. Bolt one; 271. Vertical turntable; 272. Slide rail; 273. Threaded sleeve; 274. Screw; 275. Fourth motor; 281. Stop block; 282. Rough surface; 61. Slide groove; 62. Slide opening; 71. First baffle; 72. Second baffle; 73. Slide plate; 74. Threaded hole two; 75. Bolt two; 76. Nut. Detailed Implementation

[0027] Reference Figure 1-4This invention provides a technical solution: an integrated clamping fixture for friction stir welding and machining, comprising a side plate frame 1, with two sets of side plate frames 1 symmetrically arranged. A downward telescopic lifting cylinder 3 is installed on the top of the side plate frame 1, and a pallet bracket 4 is fixed to the lower output end of the lifting cylinder 3. A pallet 6 is fixed on the pallet bracket 4, and a loading mechanism 7 is installed on the pallet 6. The loading mechanism 7 can load and fix the workpiece to be processed. A rotatable clamping mechanism 2 is installed between the tops of the two sets of side plate frames 1, and the clamping mechanism 2 can clamp the workpiece to be processed on the loading mechanism 7 and perform docking processing.

[0028] In this embodiment, the pallet 6 is provided with a groove 61, and the bottom of the groove 61 is provided with a sliding opening 62 that penetrates the pallet 6;

[0029] The loading mechanism 7 includes a first baffle 71, a second baffle 72, a bolt 75, and a nut 76. The first baffle 71 is fixed to one end of the slide groove 61. The second baffle 72 is fixed with a sliding plate 73 that slides with the slide groove 61. The sliding plate 73 is provided with a threaded hole 74. The bolt 75 can be twisted and inserted into the threaded hole 74 and pass through the slide groove 62 and be threadedly assembled with the nut 76.

[0030] The pallet 6 has a top block 5 in the middle that can support the workpiece to be processed; that is, after the workpiece to be processed is connected, the pallet is adjusted by the lifting cylinder to drive the top block to fit against the lower end face of the workpiece to be processed, which helps to reduce the vertical force on the clamping plate during the friction stir welding process of the workpiece to be processed, and helps to improve the stability of the friction stir welding of the workpiece to be processed.

[0031] The loading mechanism 7 is symmetrically arranged on the front and rear sides of the top block 5;

[0032] Specifically, in this design, by first loosening bolt two, the second baffle 72 is moved outward a certain distance. Then, the welding surface of the workpiece to be processed, which is to be subjected to friction stir welding, is placed facing the support plate 61 and is placed against the side of the first baffle. Then, the second baffle is moved to be against the surface of the workpiece and bolt two is tightened. This allows for quick initial positioning and loading of the workpiece. If the workpiece needs to be processed in batches for friction stir welding, it can be placed directly between the first baffle and the second baffle.

[0033] In this embodiment, the clamping mechanism 2 includes a frame plate 21 and a first motor 22. The middle part of the left end and the middle part of the right end of the frame plate 21 are rotatably assembled with the left side plate and the right side plate, respectively. The first motor 22 is installed on the left side plate for controlling the rotation of the frame plate 21.

[0034] Furthermore, a bidirectional telescopic cylinder 24 is installed on the left and right ends of the frame plate 21, a third motor 29 is installed on the output end of the bidirectional telescopic cylinder, and a positioning strip 23 that can slide back and forth is installed on the front and rear sides of the frame plate 21, and the positioning strip 23 is respectively connected to the output end of the left and right third motors 29.

[0035] Furthermore, the positioning strip 23 is provided with multiple positioning seats 25, a second motor 26 is installed on the positioning seat 25, a lifting mechanism 27 is installed on the second motor 26, and a clamping plate 28 for clamping the workpiece to be processed is installed on the lifting mechanism 27.

[0036] The first motor controls the rotation and flipping of the frame plate, which allows direct control of the upper and lower surfaces or the surface to be processed of the workpiece. This facilitates friction stir welding and / or machining after the friction stir welding is completed, eliminating the need for multiple disassembly and assembly of the workpiece. This improves the processing efficiency of the workpiece and reduces the degree of scratches on the surface of the workpiece caused by multiple disassembly and assembly, thus ensuring the shape and quality of the workpiece.

[0037] In this embodiment, the positioning strip 23 is provided with a central sliding cavity 231 in the middle, and the positioning strip 23 is also provided with side sliding openings 232 that are cross-shaped and connected to the central sliding cavity 231.

[0038] The positioning seat 25 includes a Chinese character slider 251 and a bolt 254. The Chinese character slider 251 is slidably assembled with the central sliding cavity 231 and the longitudinal side sliding opening. The Chinese character slider 251 is provided with a threaded hole 252 in the transverse direction. The bolt 254 can be inserted into the threaded hole 253 and fit against the positioning strip 23. The Chinese character slider 251 is also fixed with a support plate 253 perpendicular to the horizontal plane. The second motor 26 is fixed on one side of the support plate 253, and a lifting mechanism 27 controlled by the second motor 26 is rotatably installed on the other side of the support plate 253.

[0039] Specifically, by adjusting the length of the workpiece, bolt one can be loosened directly to push the support plate and move the central slider flexibly on the positioning plate. After adjusting the distance between the positioning seats on the positioning plate, bolt one can be tightened to fix the central slider. This allows for quick and efficient adjustment of the clamping plate to the position that contacts the selected fixed position on the surface of the workpiece, thereby improving the clamping stability and clamping strength of the workpiece.

[0040] In this embodiment, the lifting mechanism 27 includes a vertical turntable 271 mounted on the output end of the second motor 26. A slide rail 272 is fixed at the center of the vertical turntable 271. A screw 274 and a fourth motor 275 for adjusting the screw 274 are mounted on the slide rail 272. A threaded sleeve 273 is threadedly engaged with the screw 274 and slidably assembled with the slide rail 272. The clamping plate 28 is laterally fixedly connected to the threaded sleeve 273.

[0041] Specifically, each of the lifting mechanisms is independently controlled. The second motor controls the rotation of the lifting mechanism in the vertical plane, and the fourth motor in the lifting mechanism controls the displacement of the threaded sleeve to move the clamping plate. This allows the clamping plate on one side of the positioning strip to clamp the workpiece above or below it. It should be noted that if the clamping plate interferes with the workpiece during friction stir welding or machining, the corresponding second motor can be used to directly control the clamping plate to detach from the surface of the workpiece. Therefore, this not only makes the clamping and fixing of the workpiece more flexible, but also allows friction stir welding and / or machining processes to be performed without disassembling the workpiece.

[0042] In this embodiment, the outer end of the clamping plate 28 is provided with vertically symmetrically distributed blocks 281, thereby further improving the clamping and retention strength of the workpiece to be processed.

[0043] In this embodiment, rough surfaces 282 are provided on the surface of the block 281 and the clamping plate 28, which are located in the space between the block 281 and the clamping plate 28, to further improve the stability of the workpiece clamping.

[0044] Working principle: Step 1: Loosen bolt 2, move the second baffle outward, then place the welding surface of the workpiece to be processed facing the support plate and place it against the side of the first baffle. Then move the second baffle against the surface of the workpiece and tighten bolt 2.

[0045] Step 2: Based on the length of the workpiece, loosen bolt 1, then push it until the support plate moves the center slider to the position of the positioning strip. Then tighten bolt 1 to fix the slider in place.

[0046] Step 3: By coordinating and adjusting the second motor and the fourth motor in the lifting mechanism, adjust the clamping plate to be clamped on the top or bottom of the workpiece. After completion, adjust the second motor to drive the clamping plate to rotate up or down. That is, the clamping plate that needs to be clamped on the top of the workpiece rotates upward, and the clamping plate that needs to be clamped on the bottom of the workpiece rotates downward, so that the clamping plate forms an open angle shape.

[0047] Step 4: Adjust the pallet to the lowest position using the lifting cylinder, and place the workpiece to be processed between the first baffle and the second baffle;

[0048] Step 5: Start the third motor to adjust the positioning plate and drive the clamping plate to rotate downwards by 90°. Then, the bidirectional telescopic cylinder adjusts the positioning plate to move laterally so that the center of the vertical turntable is coplanar with the center of the workpiece. Then, the lifting cylinder moves the workpiece upwards. At the same time, the second motor adjusts the clamping plate to stick to the surface of the workpiece until it is clamped. Then, the lifting cylinder drives the support plate to make the workpiece detach from the first and second baffles. Then, the third motor adjusts the positioning plate to reset and, with the bidirectional telescopic cylinder, adjusts the positioning plate to move laterally so that the workpiece is tightly connected. Then, the lifting cylinder drives the support plate to make the top block stick to the upper surface of the workpiece. The upper surface of the workpiece can then be subjected to friction stir welding.

[0049] Step Six: Flipping the workpiece: First, the lifting cylinder drives the pallet to move the top block to the lowest point and detach it from the workpiece. Then, the first motor controls the frame to rotate 180°, and the lifting cylinder drives the pallet to reset the top block. Therefore, this process facilitates friction stir welding and subsequent machining processes, and eliminates the need for secondary clamping of the workpiece, thus improving the processing efficiency and protection of the workpiece.

[0050] The above description is merely a preferred embodiment of the invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An integrated clamping fixture for friction stir welding and machining, comprising a side plate frame (1), characterized in that, Two sets of side plate frames (1) are symmetrically arranged. A lifting cylinder (3) with downward telescopic control is installed on the top of the side plate frame (1). A tray bracket (4) is fixed at the lower output end of the lifting cylinder (3). A tray (6) is fixed on the tray bracket (4). A loading mechanism (7) is installed on the tray (6). The loading mechanism (7) can load and fix the workpiece to be processed. A rotatable clamping mechanism (2) is installed between the tops of the two sets of side plate frames (1). The clamping mechanism (2) can clamp the workpiece to be processed on the loading mechanism (7) and perform docking processing. The clamping mechanism (2) includes a frame plate frame (21) and a first motor (22). The middle part of the left end and the middle part of the right end of the frame plate frame (21) are rotatably assembled with the left side plate frame and the right side plate frame, respectively. The first motor (22) is installed on the left side plate frame to control the rotation of the frame plate frame (21). Furthermore, the left and right ends of the frame (21) are respectively equipped with bidirectional telescopic cylinders (24), the output end of the bidirectional telescopic cylinders is equipped with a third motor (29), and the front and rear sides of the frame (21) are respectively equipped with positioning strips (23) that can slide back and forth. The positioning strips (23) are respectively connected to the output ends of the left and right third motors (29). The positioning strip (23) is provided with multiple positioning seats (25), a second motor (26) is installed on the positioning seat (25), a lifting mechanism (27) is installed on the second motor (26), and a clamping plate (28) for clamping the workpiece to be processed is installed on the lifting mechanism (27). The positioning strip (23) has a central sliding cavity (231) in the middle, and the positioning strip (23) also has side sliding openings (232) that are cross-shaped and connected to the central sliding cavity (231). The positioning seat (25) includes a Chinese character slider (251) and a bolt (254). The Chinese character slider (251) is slidably assembled with the central sliding cavity (231) and the longitudinal side sliding opening. The Chinese character slider (251) is provided with a threaded hole (252) in the transverse direction. The bolt (254) can be inserted into the threaded hole (252) and fit with the positioning strip (23). The Chinese character slider (251) is also fixed with a support plate (253) perpendicular to the horizontal plane. The second motor (26) is fixed on one side of the support plate (253). The other side of the support plate (253) is rotatably installed with a lifting mechanism (27) controlled by the second motor (26).

2. The integrated clamping fixture for friction stir welding and machining according to claim 1, characterized in that, The pallet (6) is provided with a groove (61), and the bottom of the groove (61) is provided with a sliding opening (62) that penetrates the pallet (6). The loading mechanism (7) includes a first baffle (71), a second baffle (72), a bolt (75), and a nut (76). The first baffle (71) is fixed to one end of the slide groove (61). The second baffle (72) has a sliding plate (73) that slides with the slide groove (61). The sliding plate (73) has a threaded hole (74). The bolt (75) can be twisted and inserted into the threaded hole (74) and pass through the slide (62) and be threadedly assembled with the nut (76).

3. The integrated clamping fixture for friction stir welding and machining according to claim 1, characterized in that, The lifting mechanism (27) includes a vertical turntable (271) mounted on the output end of the second motor (26). A slide rail (272) is fixed at the center of the vertical turntable (271). A screw (274) and a fourth motor (275) for adjusting the screw (274) are mounted on the slide rail (272). A threaded sleeve (273) is threadedly engaged with the slide rail (272) and is slidably assembled with the threaded sleeve (273). The clamping plate (28) is horizontally fixedly connected to the threaded sleeve (273).

4. The integrated clamping fixture for friction stir welding and machining according to claim 1, characterized in that, The outer end of the clamping plate (28) is provided with vertically symmetrically distributed baffles (281).

5. The integrated clamping fixture for friction stir welding and machining according to claim 4, characterized in that, The surface of the block (281) and the surface of the clamping plate (28) located in the space between the block (281) and the clamping plate (28) are respectively provided with rough surfaces (282).

6. The integrated clamping fixture for friction stir welding and machining according to claim 1, characterized in that, The pallet (6) is provided with a top block (5) in the middle that can support the workpiece to be processed.

7. The integrated clamping fixture for friction stir welding and machining according to claim 6, characterized in that, The loading mechanism (7) is symmetrically arranged on the front and rear sides of the top block (5).

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