A positioning fixture for friction stir welding of a special-shaped workpiece

Abstract

The utility model relates to the technical field of friction stir welding, especially to a friction stir welding positioning fixture suitable for special-shaped parts. Adopt the following scheme: a friction stir welding positioning fixture suitable for special-shaped parts, including work table, multistage adjustable clamping mechanism and power mechanism, multistage adjustable clamping mechanism is slidably arranged on the work table, is used for clamping the special-shaped part of waiting to weld, power mechanism and multistage adjustable clamping mechanism transmission connection, are used for driving multistage adjustable clamping mechanism sliding. The utility model provides a friction stir welding positioning fixture suitable for special-shaped parts, solved the technical problem that the existing friction stir welding fixture mostly can only be used for fixing the workpiece of relatively neat, cannot fix some side line as arc special-shaped part.

Description

Technical Field

[0001] The utility model relates to the technical field of friction stir welding, in particular to a friction stir welding positioning fixture suitable for special-shaped parts. Background Art

[0002] The core principle of friction stir welding is to use frictional heat and plastic deformation heat as the welding heat source. By rotating a specially designed stirring head and inserting it into the workpiece, the materials at the connection part are plasticized and a dense weld seam is formed under the action of mechanical force. Different from conventional friction welding, during the friction stir welding process, a cylindrical or other shaped (such as a threaded cylinder) welding pin extends into the joint of the workpiece. Through the high-speed rotation of the welding head, it frictions with the welding workpiece material, so that the temperature of the material at the connection part rises and softens, and at the same time, the material is stirred and rubbed to complete the welding.

[0003] During friction stir welding, it is necessary to first fix the workpiece to be welded with a fixture to prevent the workpiece to be welded from shifting during the welding process. However, the existing friction stir welding fixtures cannot be finely adjusted, which results in that most of them can only be used to fix relatively regular workpieces and cannot fix some special-shaped parts with arc-shaped edges. Summary of the Utility Model

[0004] The utility model provides a friction stir welding positioning fixture suitable for special-shaped parts, which solves the technical problem that most of the existing friction stir welding fixtures can only be used to fix relatively regular workpieces and cannot fix some special-shaped parts with arc-shaped edges.

[0005] To achieve this technical purpose, the utility model adopts the following scheme: a friction stir welding positioning fixture suitable for special-shaped parts, comprising a workbench, a multi-stage adjustable clamping mechanism and a power mechanism;

[0006] The multi-stage adjustable clamping mechanism is slidably arranged on the workbench and is used for clamping the special-shaped workpiece to be welded;

[0007] The power mechanism is传动连接 with the multi-stage adjustable clamping mechanism and is used for driving the multi-stage adjustable clamping mechanism to slide.

[0008] Further, the workbench is provided with three equally spaced through grooves, and a support block for supporting the middle part of the spliced special-shaped part is fixedly arranged in the middle of the workbench.

[0009] Further, the multi-stage adjustable clamping mechanism comprises a first clamping component slidably arranged in the middle through groove and two second clamping components respectively slidably arranged in the through grooves on both sides.

[0010] Further, the first clamping component comprises two fixture bodies symmetrically distributed in the through groove;

[0011] It should be noted that there is an incorrect expression "传动连接" in the original text which should be "drivably connected". The above translation has been corrected accordingly.The fixture body includes a slider, which is slidably arranged in a through groove. At one end of the top surface of the slider away from the support block, a vertical plate is fixedly provided. A chute extending in the same direction as the through groove is formed at the top of the slider. A sliding plate is slidably arranged in the chute. At one end of the sliding plate close to the vertical plate, a baffle is fixedly provided. A screw rod is rotatably connected to one side of the baffle close to the vertical plate, and the screw rod is threadedly connected to the vertical plate.

[0012] Furthermore, the second clamping component has the same structure as the first clamping component. Two sliders of the second clamping component are slidably sleeved outside the guide rod, and the guide rod is fixedly arranged at the bottom of the workbench.

[0013] Furthermore, the power mechanism includes a lead screw and a motor;

[0014] The lead screw is rotatably connected to the workbench through a bearing. Positive threads and reverse threads are respectively arranged at both ends of the lead screw, and the positive threads and the reverse threads are respectively threadedly sleeved with two sliders of the first clamping component;

[0015] The output end of the motor is coaxially and fixedly connected to one end of the lead screw, and the motor is fixedly connected to the workbench.

[0016] Furthermore, the sliders on the same side are sequentially connected through fixing rods.

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

[0018] The friction stir welding positioning fixture for special-shaped parts disclosed by the present utility model can finely adjust the position of the fixture body by setting a multi-stage adjustable clamping mechanism, so that all fixture bodies can clamp the sides and the bottom of the待焊接异形件 (to-be-welded special-shaped part), preventing some fixtures from not being able to contact the special-shaped part, thereby preventing the displacement of the special-shaped part. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a friction stir welding positioning fixture for special-shaped parts provided by an embodiment of the present utility model;

[0020] Figure 2 is Figure 1 the enlarged view of part A in

[0021] Figure 3 is another view of a friction stir welding positioning fixture for special-shaped parts provided by an embodiment of the present utility model; [[ID=3⑧]]

[0022] Figure 4 is Figure 3 the enlarged view of part B in

[0023] DESCRIPTION OF THE REFERENCE NUMERALS:

[0024] 1. Workbench; 11. Through groove; 12. Support block; 2. Multi-stage adjustable clamping mechanism; 21. First clamping component; 22. Second clamping component; 211. Fixture body; 2111. Slide block; 2112. Chute; 2113. Vertical plate; 2114. Slide plate; 2115. Baffle; 2116. Screw; 3. Power mechanism; 31. Screw rod; 32. Motor; 4. Guide rod; 5. Fixed rod. Specific embodiments

[0025] To fully understand the purpose, features and effects of the present invention, detailed descriptions of the present invention are provided through the following specific embodiments, but the present invention is not limited thereto.

[0026] As Figures 1 to 4 shown, a friction stir welding positioning fixture for special-shaped parts provided by the present invention includes a workbench 1, a multi-stage adjustable clamping mechanism 2 and a power mechanism 3. The workbench 1 is provided with three equally spaced through grooves 11 distributed along its length direction, and a support block 12 for supporting the middle part of the spliced special-shaped parts is fixedly arranged in the middle of the workbench 1.

[0027] [[ID=X]]The multi-stage adjustable clamping mechanism 2 is slidably arranged on the workbench 1 and is used for clamping the special-shaped parts to be welded. The multi-stage adjustable clamping mechanism 2 includes a first clamping component 21 slidably arranged in the middle through groove 11 and two second clamping components 22 respectively slidably arranged in the through grooves 11 on both sides

[0028] The first clamping component 21 includes two fixture bodies 211 that slide in the through groove 11 and are symmetrically distributed. The fixture body 211 includes a slide block 2111, the slide block 2111 is slidably arranged in the through groove 11, a vertical plate 2113 is fixedly arranged at one end of the top surface of the slide block 2111 away from the support block 12, a chute 2112 extending in the same direction as the through groove 11 is opened at the top of the slide block 2111, a slide plate 2114 is slidably arranged in the chute 2112, a baffle 2115 is fixedly arranged at one end of the slide plate 2114 close to the vertical plate 2113, and a screw 2116 is rotatably connected to one side of the baffle 2115 close to the vertical plate 2113, and the screw 2116 is threadedly connected to the vertical plate 2113.

[0029] The second clamping component 22 has the same structure as the first clamping component 21, and the two slide blocks 2111 of the second clamping component 22 are slidably sleeved outside the guide rod 4, and the guide rod 4 is fixedly arranged at the bottom of the workbench 1.

[0030] The power mechanism 3 is传动连接 with the multi-stage adjustable clamping mechanism 2 and is used to drive the multi-stage adjustable clamping mechanism 2 to slide.

[0031] Note: In the original text, the description "动力机构3和多级可调节夹持机构2传动连接" has an unclear expression "传动连接". I have translated it as "传动连接" for now. If there is a more accurate term, it can be adjusted accordingly.The power mechanism 3 includes a lead screw 31 and a motor 32. The lead screw 31 is rotatably connected to the workbench 1 through bearings. Positive threads and reverse threads are provided at both ends of the lead screw 31, and the positive threads and the reverse threads are respectively threadedly sleeved with two sliders 2111 of the first clamping component 21. The output end of the motor 32 is coaxially and fixedly connected to one end of the lead screw 31, and the motor 32 is fixedly connected to the workbench 1.

[0032] Further, the sliders 2111 on the same side are sequentially connected by a fixing rod 5.

[0033] During use, first use a lifting tool to lift two special-shaped parts to be spliced, place the end of the special-shaped part far from the splicing position on the top surface of the sliding plate 2114, then place the side of the special-shaped part to be spliced on the support block 12 and assemble it. Subsequently, remove the lifting tool. Start the motor 32, and the motor 32 drives the lead screw 31 to rotate. The two sliders 2111 of the first clamping component 21 approach each other. At the same time, the sliders 2111 of the second clamping component 22 also approach each other under the drive of the fixing rod 5 until a baffle 2115 abuts against the side of the special-shaped part, then stop the motor 32.

[0034] Subsequently, manually rotate each screw 2116 in sequence. The screw 2116 drives the baffle 2115 to move until all the baffles 2115 are in contact with the side of the special-shaped part, then the fixation of the special-shaped part is completed.

[0035] Obviously, in order to further prevent the special-shaped part from sliding, anti-slip pads can be provided on the surfaces of parts such as the support block 12, the sliding plate 2114, and the baffle 2115 that contact the special-shaped part.

[0036] Finally, it should be noted that: the above-listed are only the preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and variations fall within the scope of the claims of the present invention and its equivalent technologies, they should be considered as the protection scope of the present invention.

Claims

1. A positioning fixture for friction stir welding of irregularly shaped parts, characterized in that, It includes a worktable (1), a multi-stage adjustable clamping mechanism (2), and a power mechanism (3); The multi-stage adjustable clamping mechanism (2) is slidably mounted on the worktable (1) for clamping irregularly shaped parts to be welded; The power mechanism (3) and the multi-stage adjustable clamping mechanism (2) are connected by a transmission to drive the multi-stage adjustable clamping mechanism (2) to slide.

2. The positioning fixture for friction stir welding of irregularly shaped parts according to claim 1, characterized in that, The workbench (1) has three equally spaced through slots (11), and a support block (12) for supporting the middle part of the assembled irregular part is fixed in the middle of the workbench (1).

3. A positioning fixture for friction stir welding of irregularly shaped parts according to claim 2, characterized in that, The multi-stage adjustable clamping mechanism (2) includes a first clamping component (21) slidably disposed in the central through groove (11) and two second clamping components (22) slidably disposed in the through grooves (11) on both sides respectively.

4. A positioning fixture for friction stir welding of irregularly shaped parts according to claim 3, characterized in that, The first clamping assembly (21) includes two clamping bodies (211) symmetrically distributed within the through slot (11); The clamp body (211) includes a slider (2111), which is slidably disposed in the through groove (11). A vertical plate (2113) is fixedly disposed at one end of the top surface of the slider (2111) away from the support block (12). A sliding groove (2112) extending in the same direction as the through groove (11) is opened on the top of the slider (2111). A sliding plate (2114) is slidably disposed in the sliding groove (2112). A baffle (2115) is fixedly disposed at one end of the sliding plate (2114) near the vertical plate (2113). A screw (2116) is rotatably connected to the side of the baffle (2115) near the vertical plate (2113). The screw (2116) and the vertical plate (2113) are threadedly connected.

5. A positioning fixture for friction stir welding of irregularly shaped parts according to claim 4, characterized in that, The second clamping assembly (22) has the same structure as the first clamping assembly (21). The two sliders (2111) of the second clamping assembly (22) are slidably sleeved on the outside of the guide rod (4), which is fixed to the bottom of the worktable (1).

6. A positioning fixture for friction stir welding of irregularly shaped parts according to claim 5, characterized in that, The power mechanism (3) includes a lead screw (31) and a motor (32); The lead screw (31) is rotatably connected to the worktable (1) via a bearing. The two ends of the lead screw (31) are respectively provided with a forward thread and a reverse thread. The forward thread and the reverse thread are respectively threadedly connected to the two sliders (2111) of the first clamping assembly (21). The output end of the motor (32) and one end of the lead screw (31) are coaxially and fixedly connected, and the motor (32) and the worktable (1) are fixedly connected.

7. A positioning fixture for friction stir welding of irregularly shaped parts according to claim 6, characterized in that, The sliders (2111) on the same side are connected in sequence by a fixing rod (5).

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