Rapid positioning device for high-precision mechanical welding

Abstract

The utility model provides a rapid positioning device for high-precision mechanical welding, and relates to the field of positioning tools for welding. The positioning piece comprises a first positioning rod connected with the supporting table and a second positioning rod capable of moving on the supporting table; the two ends of the flexible piece are connected with the first positioning rod and the second positioning rod respectively, and the end, connected with the second positioning rod, of the flexible piece can move in the second positioning rod and be tightened; wherein the second positioning rod comprises a second rod body and a folded plate, the second rod body is connected with the supporting table, a V-shaped groove is formed in the second rod body, the folded plate can be pressed into the V-shaped groove after being folded, and the flexible piece is located between the two folded plates. The radial position of the positioning piece can be adjusted according to the curvature difference of workpieces, and high-precision positioning of cambered surfaces with different curvatures is achieved by changing the positioning contact point track on the premise that the main body structure of the clamp is kept unchanged.

Description

Technical Field

[0001] This utility model relates to the field of positioning tools for welding, and in particular to a high-precision mechanical welding rapid positioning device. Background Technology

[0002] In the field of welding curved workpieces, existing fixtures mostly adopt a fixed positioning structure that is completely fitted to the workpiece's curved surface, with its contour strictly matching a specific curvature. When the curvature of the workpiece's curved surface changes, it is necessary to replace the entire positioning module corresponding to the contour or rely on a multi-degree-of-freedom adjustment mechanism to achieve adaptation. The former leads to a surge in fixture inventory costs and low switching efficiency, while the latter suffers from poor stability and cumbersome operation due to the complexity of the adjustment mechanism. Especially for the butt welding of two workpieces with irregular curved surfaces, traditional solutions cannot guarantee the synchronous adaptive positioning of hyperboloids in the same batch of workpieces, nor can they achieve rapid curvature adaptation while maintaining structural rigidity. This results in a significant decrease in workpiece clamping accuracy and welding quality as the curvature difference increases. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the embodiments of this utility model provide a high-precision mechanical welding rapid positioning device. The technical problem to be solved by this utility model is that the existing arc surface welding fixtures are difficult to achieve precise positioning of workpieces with different curvatures through simple adjustment while maintaining structural stability, resulting in frequent fixture replacement, poor adjustment accuracy and high overall cost when welding workpieces of multiple specifications.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-precision mechanical welding rapid positioning device, comprising a support platform placed on a worktable; a positioning component, including a positioning rod one connected to the support platform and a positioning rod two movable on the support platform; a flexible sheet, with both ends connected to the positioning rod one and the positioning rod two respectively, the end of the flexible sheet connected to the positioning rod two being movable and taut within the positioning rod two; wherein, the positioning rod two includes a rod body two and a folded plate, the rod body two being connected to the support platform, a V-shaped groove being formed inside the rod body two, the folded plate being folded and pressed into the V-shaped groove, and the flexible sheet being located between the two folded folded plates.

[0005] In a preferred embodiment, the height of the folded plate after folding is greater than the depth of the V-shaped groove.

[0006] In a preferred embodiment, the positioning rod includes a rod body and a folded plate. The rod body is connected to the support platform, and a connecting strip is inserted into the rod body. One end of the connecting strip and the flexible sheet is fixed.

[0007] In a preferred embodiment, the upper part of the rod body has a vertical plane, and the flexible sheet, the connecting strip and the plane are smoothly transitioned.

[0008] In a preferred embodiment, the connecting strip is located on one side of the rod body, and there is a smooth transition between the connecting strip and the flexible sheet.

[0009] In a preferred embodiment, the surface of the flexible sheet has two positioning ridges.

[0010] In a preferred embodiment, the support platform includes a set of symmetrically arranged components. Each set of components includes a platform body one and a platform body two. Platform body one and platform body two are detachable, and both have space at their lower parts for hand passage. Platform body one has a circular stepped hole, and platform body two has a long stepped hole. Rod body one is connected to the circular stepped hole, and rod body two can slide in the long stepped hole. Bolt fasteners are used to limit the position of rod body one and rod body two.

[0011] In a preferred embodiment, a placement groove is provided at an opposite position of the two platforms, and the placement groove is filled with welding powder.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] This application achieves high-precision positioning of curved surfaces with different curvatures by using an adjustable positioning component assembly and a hyperboloid fitting mechanism in a coordinated design. This allows the positioning component to be radially adjusted according to the curvature difference of the workpiece. Under the premise of maintaining the main structure of the fixture, high-precision positioning of curved surfaces with different curvatures can be achieved by changing the trajectory of the positioning contact point. Attached Figure Description

[0014] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0015] Figure 1 This is a structural diagram of the positioning device of this utility model.

[0016] Figure 2 This is a side view of the positioning device of this utility model.

[0017] Figure 3 This is a top view of the positioning device of this utility model.

[0018] Figure 4 This is a structural diagram of the positioning rod one in this utility model.

[0019] Figure 5 for Figure 4 A magnified view of A in the middle.

[0020] Figure 6 This is a structural diagram of another form of the positioning rod in this utility model.

[0021] Figure 7 for Figure 6Enlarged view of B

[0022] Figure 8 This is a structural diagram of the positioning rod two in this utility model.

[0023] Figure 9 This is a schematic diagram of a workpiece applicable to the positioning device in this utility model.

[0024] The attached figures are labeled as follows: 10, support platform; 11, platform body one; 12, platform body two; 13, circular stepped hole; 14, long stepped hole; 15, placement groove; 20, positioning component; 21, positioning rod one; 211, rod body one; 212, connecting strip; 22, positioning rod two; 221, rod body two; 222, folding plate; 30, flexible sheet. Detailed Implementation

[0025] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0026] Example

[0027] This product mainly consists of a support platform 10, a positioning component 20, and a flexible sheet 30.

[0028] The support platform 10 includes paired components. Each component includes a platform body 11, a platform body 12, a circular stepped hole 13, a long stepped hole 14, and a placement groove 15. The connecting surfaces of platform body 11 and platform body 12 can be connected by threaded fasteners, magnetic attraction, or locating pins. Any existing connection method that allows for the detachable connection of platform body 11 and platform body 12 is acceptable. Platform body 11 has a circular stepped hole 13, and platform body 12 has a long stepped hole 14. A placement groove 15 is formed on the surfaces of the two platform bodies 11 that are close to each other. The placement groove 15 can be filled with welding powder.

[0029] Both platform 11 and platform 2 12 have space at the bottom for users to pass through.

[0030] The positioning component 20 includes a positioning rod 21 and a positioning rod 22. The positioning rod 21 is used to connect with the circular stepped hole 13, and the positioning rod 22 is used to connect with the long stepped hole 14.

[0031] The flexible sheet 30 is connected between positioning rod 1 21 and positioning rod 22. By changing the relative position of positioning rod 1 21 and positioning rod 22, the curvature of the flexible sheet 30 is changed, allowing the pickaxes with sidewalls of different curvatures to be positioned on the flexible surface. During the positioning process of the same batch of workpieces, after the first workpiece is positioned, the subsequent workpieces can be quickly positioned by abutting each other, thus enabling the two workpieces to be welded to be positioned quickly and accurately.

[0032] The first structural design of the positioning rod 21 includes a rod body 211 and a connecting strip 212. The rod body 211 is a component with an upper half being a semi-cylindrical body and a lower half being a complete cylinder. The connecting strip 212 is slidably embedded into a slot opened in the rod body 211. The straight side wall of the semi-cylindrical body 211, the side of the connecting strip 212, and the flexible sheet 30 are coplanar, which together serve to fit the arc-shaped side wall of the workpiece.

[0033] It should be noted that the straight sidewall of the half-cylinder of rod 211 is opened along any diameter of the cross section of rod 211.

[0034] This design is suitable for workpieces whose curved edges gradually approach a flat surface near the welding surface, to fit the straight sidewall of rod 211.

[0035] The second structural design of the positioning rod 21 includes a rod body 211 and a connecting strip 212. The rod body 211 is a complete cylinder, and the connecting strip 212 is slidably connected in a slot opened in the rod body 211. The connecting strip 212 and the flexible sheet 30 are connected by an adhesive. The arc-shaped surface of the workpiece is in contact with the flexible sheet 30, and the workpiece is not in contact with the rod body 211 at this time. The workpiece is in contact with the flexible sheet 30, and the welding end of the workpiece extends out of the connecting strip 212.

[0036] The above design can be chosen from two options based on the applicability of the workpiece.

[0037] The positioning rod 22 includes a rod body 221 and a folding plate 222. The rod body 221 has a V-shaped groove with the opening facing upward. The folding plate 222 can be folded along the crease of the center line. The flexible sheet 30 is placed on either side of the crease of the folding plate 222. After folding the folding plate 222, the side with the crease of the folding plate 222 is pressed downward into the V-shaped groove. The position of the flexible sheet 30 is defined by the frictional resistance and pressure between the V-shaped groove and the folding plate 222.

[0038] Furthermore, anti-slip ridges are provided on the side of the folding plate 222 to improve the positional stability between the flexible sheet 30 and the rod 221.

[0039] The bottom surface of rod 211 presses against the stepped surface of the circular stepped hole 13. A bolt is passed through the circular stepped hole 13 from below the platform 11 and threaded onto rod 211, clamping the stepped surface of the circular stepped hole 13 to fix rod 211 onto platform 11. A long stepped hole 14 with a stepped surface is opened on platform 2 12. A bolt is passed through the long stepped hole 14 and threaded onto rod 221, clamping the stepped surface of the long stepped hole 14 to fix rod 221 onto platform 2 12. Since rod 221 can move freely on the long stepped hole, the bolt is tightened when it reaches the designated position.

[0040] It is important to know that when the center of curvature of the long stepped hole 14 coincides with the central axis of the circular stepped hole 13, the folding plate 222 clamps the flexible sheet 30, and then the position of the second positioning rod 221 is adjusted. Because the length of the flexible sheet 30 is fixed, the movement of the second positioning rod 22 is actually a circle with the flexible sheet 30 as the radius, which is suitable for workpieces with the same curvature of the arc edge.

[0041] When the curvature center of the long stepped hole 14 and the central axis of the circular stepped hole 13 do not coincide, it is necessary to first change the position of the flexible sheet 30 in the folded plate 222, and then move the second positioning rod 22 along the long stepped hole 14. This can adjust the curvature of the positioning part 20 and tighten the flexible sheet 30 at the same time, ensuring that the flexible sheet 30 is not easily deformed between the first positioning rod 21 and the second positioning rod 22. This method is suitable for workpieces with different curvatures.

[0042] Preferably, the flexible sheet 30 can be supported by a thin copper plate or a thin aluminum plate, both of which combine the characteristics of being lightweight and flexible.

[0043] It should be noted that in this application, the length of the flexible sheet 30 is made as long as possible greater than the length of the arc edge of the workpiece to avoid contact between the arc edge and the rod 221.

[0044] It is important to know that two protruding ridges can be machined on the surface of the flexible sheet 30. These ridges can then contact the curved surface of the workpiece, reducing the error caused by an excessively large contact area during positioning.

[0045] After the above positioning is completed, take another G-clamp and clamp the workpiece onto the support table 10.

[0046] In summary, this application, through the coordinated design of the adjustable positioning component assembly and the hyperboloid fitting mechanism, enables the positioning component to adjust its radial position according to the curvature difference of the workpiece. Under the premise of maintaining the main structure of the fixture unchanged, adaptive envelope positioning of arc surfaces with different curvatures can be achieved by changing the trajectory of the positioning contact point.

[0047] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A high-precision mechanical welding rapid positioning device, characterized in that, include: A support platform (10) is placed on the workbench; The positioning element (20) includes a positioning rod one (21) connected to the support platform (10) and a positioning rod two (22) movable on the support platform (10); The flexible sheet (30) is connected to positioning rod one (21) and positioning rod two (22) at both ends respectively. The end of the flexible sheet (30) connected to positioning rod two (22) can move and be tightened in positioning rod two (22); The positioning rod 2 (22) includes rod body 2 (221) and folding plate (222). Rod body 2 (221) is connected to support platform (10). A V-shaped groove is opened in rod body 2 (221). After folding, the folding plate (222) can be pressed into the V-shaped groove. The flexible sheet (30) is located between the two folded folding plates (222).

2. The high-precision mechanical welding rapid positioning device according to claim 1, characterized in that, The height of the folded plate (222) after folding is greater than the depth of the V-shaped groove.

3. The high-precision mechanical welding rapid positioning device according to claim 1, characterized in that, The positioning rod (21) includes a rod body (211) and a folding plate (222). The rod body (211) is connected to the support platform (10). A connecting strip (212) is inserted into the rod body (211). The connecting strip (212) is fixed to one end of the flexible sheet (30).

4. The high-precision mechanical welding rapid positioning device according to claim 3, characterized in that, The upper part of the rod (211) has a vertical plane, and the flexible sheet (30), the connecting strip (212) and the plane are smoothly connected.

5. A high-precision mechanical welding rapid positioning device according to claim 3, characterized in that, The connecting strip (212) is located on one side of the rod (211), and there is a smooth transition between the connecting strip (212) and the flexible sheet (30).

6. The high-precision mechanical welding rapid positioning device according to claim 1, characterized in that, The flexible sheet (30) has two positioning ridges on its surface.

7. The high-precision mechanical welding rapid positioning device according to claim 1, characterized in that, The support platform (10) includes a set of symmetrically arranged components. Each set of components includes a platform body one (11) and a platform body two (12). Platform body one (11) and platform body two (12) are detachable, and both have space for hands to pass through at their lower parts. Platform body one (11) has a circular stepped hole (13), and platform body two (12) has a long stepped hole (14). Rod body one (211) is connected to the circular stepped hole (13), and rod body two (221) can slide in the long stepped hole (14). Bolt fasteners are used to limit the position of rod body one (211) and rod body two (221).

8. A high-precision mechanical welding rapid positioning device according to claim 7, characterized in that, Placement slots (15) are provided at opposite positions of the two platforms (11), and welding powder is piled in the placement slots (15).

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